CN101192828A - Automatic multi-folded step frequency adjustment for pressure control oscillator - Google Patents

Automatic multi-folded step frequency adjustment for pressure control oscillator Download PDF

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Publication number
CN101192828A
CN101192828A CNA2006101625829A CN200610162582A CN101192828A CN 101192828 A CN101192828 A CN 101192828A CN A2006101625829 A CNA2006101625829 A CN A2006101625829A CN 200610162582 A CN200610162582 A CN 200610162582A CN 101192828 A CN101192828 A CN 101192828A
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voltage
curve
frequency
signal
output
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林志钦
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SHENGDA SEMICONDUCTOR CO Ltd
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SHENGDA SEMICONDUCTOR CO Ltd
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Abstract

The invention provides a method for automatically adjusting frequency in multiple steps. The method comprises a control circuit which produces a plurality of control signals according to an input control voltage, a voltage to voltage switching circuit which produces a group of differential control voltages according to the input control voltage and the control signals produced by the control circuit, and a voltage-controlled oscillator, the output signal frequency of which is decided by the differential control voltages produced by the voltage to voltage switching circuit and the control signals produced by the control circuit. The method can produce a plurality of frequency adjustment curves by utilizing few control signals to provide a broader frequency locking range and meanwhile frequency gap between the adjacent frequency adjustment curves can be avoided.

Description

The automatic multi step frequency of voltage-controlled oscillator (VCO) is adjusted
Technical field
The present invention relates to a kind of frequency Adjustment System and method of voltage-controlled oscillator (VCO), particularly a kind of automatic multi step frequency Adjustment System and method with voltage-controlled oscillator (VCO) of many frequencies adjustment curves.
Background technology
Please refer to Fig. 1, Fig. 1 shows the circuit function block schematic diagram of an existing phase-locked loop 100 (charge-pump PLL), phase-locked loop 100 comprises a parametric frequency divider 102 (reference divider), one phase/frequency detector 104 (phase/frequency detector, PFD), one charging circuit 106 (charge pump), one loop filter 108 (loop filter), one bias generator 110 (biasgenerator), one voltage-controlled oscillator (VCO) 112 (voltage controlled oscillator), one output translator 114 (output converter), and a back coupling frequency divider 116 (feedback divider).
Phase/frequency detector 104 is used for the phase place that the phase place and of comparison one reference signal Sref is feedback signal Sfb, and producing a wrong signal (error signal), the pulse duration of mistake signal (pulse width) is represented reference signal Sref and the phase difference of feedbacking signal Sfb.Reference signal Sref is with input signal Sin gained behind a parametric frequency divider 102 frequency divisions.When phase place that the phase-lead of reference signal Sref is feedback signal Sfb, the mistake signal is one liter of signal (Up signal); When phase place that the phase lag of reference signal Sref is feedback signal Sfb, the mistake signal is to fall signal (Down signal).
Charging circuit 106 is one liter of signal according to wrong signal or falls signal, adds electric weight to the capacitor of loop filter 108 or the capacitor of self-loop filter 108 and reduces electric weight.Loop filter 108 is that a low pass filter (not shown) is in order to produce an input control voltage Vctrl, bias generator 110 converts input control voltage Vctrl to the output frequency of one bias voltage Vbias of suitable voltage-controlled oscillator (VCO) 112 input voltage ranges in order to control voltage-controlled oscillator (VCO) 112, output translator 114 is wavers, convert square wave to according to the DC level of required adjustment voltage-controlled oscillator (VCO) 112 output waveform S1 or with output waveform S1, feedback frequency divider 116 in order to output translator 114 output signal Sout frequency divisions are also produced back coupling signal Sfb.
Application for low jitter (jitter) phase-locked loop, the gain of the voltage-controlled oscillator (VCO) 112 in Fig. 1 is the smaller the better under the situation that does not influence stability, in other words, the frequency of voltage-controlled oscillator (VCO) adjustment slope of a curve is the smaller the better under the situation that does not influence stability.Therefore the voltage-controlled oscillator (VCO) 112 in Fig. 1 phase-locked loop 100 is designed to provide multiple frequency to adjust curve usually, selects a certain frequency to adjust curve by digital control signal Sctrl then.See also Fig. 2, Fig. 2 selects a wherein frequency curve for the voltage-controlled oscillator (VCO) of Fig. 1 can provide eight frequencies to adjust the schematic diagram of curve by a digital control input signal Sctrl.For instance, suppose in the application of phase-locked loop 100, the input control voltage Vctrl scope that loop filter 108 is produced is between a maximum value voltage Vmax and a valley voltage Vmin, if digital control input signal Sctrl is set at 5, then the output frequency covering scope of voltage-controlled oscillator (VCO) 102 is between a peak frequency Fmax and a minimum frequency Fmin shown in Figure 2, that is to say, by the set point that changes Sctrl, except reference frequency output that can extension voltage-controlled oscillator (VCO) 102, also can reduce frequency simultaneously and adjust slope of a curve.It is noted that between the adjacent frequency adjustment curve to have frequency gap to exist, because if required output frequency just drops on frequency gap, then voltage-controlled oscillator (VCO) can't lock required output frequency, see also Fig. 3, Fig. 3 is the schematic diagram of frequency gap, its occurrence cause can be because design is bad, also might be because factors such as process drift cause.
Summary of the invention
The invention provides the automatic multi step frequency Adjustment System and the method for a voltage-controlled oscillator (VCO), include a control circuit, in order to receiving an input control voltage, and according to this input control voltage produce one first controlling signal, one second controlling signal, an electric capacity activates signal and a bias current activates signal; One voltage is to voltage conversion circuit, have many group output voltage curves, in order to receive this input control voltage, this first controlling signal and this second controlling signal, according to this first controlling signal, and this second controlling signal, by selecting one group of output voltage curve in many groups output voltage curve, according to this input control voltage, produce one group of Differential Control voltage again in this group output voltage curve; An and voltage-controlled oscillator (VCO), activate signal in order to receive this group Differential Control voltage, this electric capacity actuating signal and this bias current, and according to this electric capacity activate signal, this bias current activates signal and this voltage to selected this group output voltage curve of voltage conversion circuit produces frequency adjustment curve, and, adjust the frequency output signal that curve produces a correspondence in this frequency according to this group Differential Control voltage.
Description of drawings
Fig. 1 shows the circuit function block schematic diagram of an existing phase-locked loop.
Fig. 2 can provide eight frequencies to adjust the schematic diagram of curve for the voltage-controlled oscillator (VCO) of Fig. 1.
Fig. 3 shows voltage-controlled oscillator (VCO) because of designing the schematic diagram that factors such as bad or process drift are directed at frequency gap.
But Fig. 4 shows the voltage-controlled concussion system that adjusts according to an automatic multi step frequency of the present invention.
Fig. 5 shows the internal circuit configuration figure of the control circuit of Fig. 4.
Fig. 6 is that to activate signal CAP_EN be that to activate signal ACC_EN be decapacitation for activation and bias current to hypothesis electric capacity, when considering the situation of the first controlling signal EN_1 and the second controlling signal EN_2 effect, the work schematic diagram of three relation curves of N end control voltage and input control voltage.
Fig. 7 is that hypothesis electric capacity activates signal CAP_EN and bias current actuating signal ACC_EN is decapacitation, when considering the situation of the first controlling signal EN_1 and the second controlling signal EN_2 effect, the work schematic diagram of three relation curves of N end control voltage and input control voltage.
Fig. 8 is that to activate signal CAP_EN be that to activate signal ACC_EN be activation for decapacitation and bias current to hypothesis electric capacity, when considering the situation of the first controlling signal EN_1 and the second controlling signal EN_2 effect, the work schematic diagram of three relation curves of N end control voltage and input control voltage.
Fig. 9 shows when considering that electric capacity activates the situation of signal and the effect of bias current actuating signal, the work schematic diagram of the frequency of concussion signal and three relation curves of input control voltage.
Figure 10 shows and considers that at the same time first controlling signal, second controlling signal, electric capacity activate signal, activate time spent of doing of signal, the work schematic diagram of the frequency of concussion signal and nine relation curves of input control voltage with bias current.
The reference numeral explanation
100 phase-locked loops, 102 parametric frequency dividers
104 phase/frequency detectors, 106 charging circuits
108 path filters, 110 bias generators
114 output translators 116 are awarded frequency divider
400 voltage-controlled concussion systems, 410 control circuits
420 voltages are to voltage conversion circuit 430,112 voltage-controlled oscillator (VCO)s
501 Yi Shi Mite circuits for triggering, 502 Er Shi Mite circuits for triggering
The close special circuits for triggering of 503 the 3rd Shi Mite circuits for triggering, 504 histories of the village, the commune, the factory and the familys
511 first inverters, 512 second inverters
513 the 3rd inverters 514 the 4th inverter
515 the 5th inverters, 516 hex inverters
517 the 7th inverters, 521 first multiplexers
522 second multiplexers 523 the 3rd multiplexer
524 the 4th multiplexers 531 a SR gate latch device
532 the 2nd SR gate latch devices, 533 Three S's R gate latch devices
541 D type gate latch devices, 610 N hold the first output voltage curve
620 N hold the second output voltage curve, 630 N to hold the 3rd output voltage curve
640 N hold the 4th output voltage curve 650 N to hold the 5th output voltage curve
660 N hold the 6th output voltage curve 670 N to hold the 7th output voltage curve
680 N hold the 8th output voltage curve 690 N to hold the 9th output voltage curve
710,810 first frequencies are adjusted curve 720,820 second frequencies and are adjusted curve
730,830 the 3rd frequencies are adjusted curve 840 the 4th frequency and are adjusted curve
850 the 5th frequencies are adjusted curve 860 the 6th frequency and are adjusted curve
870 the 7th frequencies are adjusted curve 880 the 8th frequency and are adjusted curve
890 the 9th frequencies are adjusted the digital control input signal of curve S ctrl
Fmax peak frequency Fmin minimum frequency
Vbias bias voltage Vctrl input control voltage
The valley voltage of the maximum value voltage Vmin Vctrl of Vmax Vctrl
The EN_1 first controlling signal EN_2 second controlling signal
VN N end control voltage VP P end control voltage
CAP_EN electric capacity activates signal ACC_EN bias current and activates signal
Sosc concussion signal SLK phase place is pinned signal
Embodiment
See also Fig. 4, but Fig. 4 shows the voltage-controlled concussion system 400 that adjusts according to an automatic multi step frequency of the present invention, voltage-controlled concussion system 400 includes a control circuit 410, a voltage to a voltage conversion circuit 420 and a voltage-controlled oscillator (VCO) 430.Control circuit 410 is in order to receive an input control voltage Vctrl, and produce one first controlling signal EN_1 according to this input control voltage Vctrl, one second controlling signal EN_2, one electric capacity activates signal CAP_EN, and one bias current activate signal ACC_EN, in addition, control circuit 410 is also accepted a phase place and is pinned signal SLK, phase place is pinned detector (Lock Detector, not shown) and is exported the first controlling signal EN_1 that the phase place pinning signal SLK of a high level is produced with lock control circuit 410 when system finishes lock-out state, the second controlling signal EN_2, electric capacity activates signal CAP_EN, and bias current activates signal ACC_EN.Voltage to voltage conversion circuit 420 has many group output voltage curves, in order to receive input control voltage Vctrl, the first controlling signal EN_1 and the second controlling signal EN_2, and according to the first controlling signal EN_1, and the second controlling signal EN_2, by selecting one group of output voltage curve in many groups output voltage curve, according to input control voltage Vctrl, produce N end control voltage VN and P end control voltage VP again in this group output voltage curve.N end control voltage VN, P hold control voltage VP to voltage-controlled oscillator (VCO), electric capacity activates signal CAP_EN and bias current activates signal ACC_EN in order to receive, and according to electric capacity activate signal CAP_EN, bias current activates signal ACC_EN and this voltage to selected this group output voltage curve of voltage conversion circuit produces frequency adjustment curve, and, adjust the frequency output signal that curve produces a correspondence in this frequency according to this N end control voltage and this P end control voltage.
Electric capacity activates signal CAP_EN and is used for switching on or off the output frequency that voltage-controlled oscillator (VCO) 430 interior extra load capacitance (not shown) change voltage-controlled oscillator (VCO) 430, and bias current activates signal ACC_EN and is used for switching on or off the output frequency that voltage-controlled oscillator (VCO) 430 interior extra bias current (not shown) change voltage-controlled oscillator (VCO) 430.N end control voltage VN and P end control voltage VP form the output frequency that one group of Differential Control voltage is controlled voltage-controlled oscillator (VCO) 430, N end control voltage VN is in order to the grid voltage of the NMOS field-effect transistor (not shown) of control voltage-controlled oscillator (VCO) 430 inner control operating currents, P end control voltage VP is in order to the grid voltage of the PMOS field-effect transistor (not shown) of control voltage-controlled oscillator (VCO) 430 inner control operating currents, N end control voltage VN rises to promote the output current of NMOS field-effect transistor with the increase of input control voltage Vctrl, P end control voltage VP descends to promote the output current of PMOS field-effect transistor with the increase of input control voltage Vctrl, so when input control voltage Vctrl increases, the operating current of voltage-controlled oscillator (VCO) 430 can and then increase, the frequency that is directed at output concussion signal Sosc rises, related work circuit and the control principle of N end control voltage VN and P end control voltage VP are known by those skilled in the art, so repeat no more.
See also Fig. 5, Fig. 5 shows the internal circuit configuration figure of the control circuit 410 of Fig. 4, and control circuit 410 includes: Yi Shi Mite circuits for triggering 501, comprise an input, and be used for receiving input control voltage Vctrl, and an output; One first inverter 511 comprises an input, is coupled to the output of the reverse circuits for triggering 501 of Yi Shi Mite, and an output; One Er Shi Mite circuits for triggering 502 comprise an input, are used for receiving input control voltage Vctrl, and an output; One second inverter 512 comprises an input, is coupled to the output of the reverse circuits for triggering 502 of Er Shi Mite, and an output; One the 3rd Shi Mite circuits for triggering 503 comprise an input, are used for receiving input control voltage Vctrl, and an output; One the 3rd inverter 513 comprises an input, is coupled to the output of the reverse circuits for triggering 503 of the 3rd Shi Mite, and an output; The close special circuits for triggering 504 of one histories of the village, the commune, the factory and the family comprise an input, are used for receiving input control voltage Vctrl, and an output; One the 4th inverter 514 comprises an input, is coupled to the output of the reverse circuits for triggering 504 of histories of the village, the commune, the factory and the family Mi Te, and an output; One the 5th inverter 515 comprises an input, is coupled to the output of first inverter 511, and an output; One hex inverter 516 comprises an input, is coupled to the output of second inverter 512, and an output; One first multiplexer 521 comprises one first signal input end, is coupled to the output of first inverter 511, and one second signal input end is coupled to the output of second inverter 512, and one selects a signal input end and an output; One second multiplexer 522 comprises one first signal input end, is coupled to the output of second inverter 512, and one second signal input end is coupled to the output of the 3rd inverter 513, and one selects a signal input end and an output; One the one SR gate latch device (Gated SR Latch) 531, comprise a R input, be coupled to the output of the 5th inverter 515, one S input is coupled to the output of the 3rd inverter 513, one reversed-phase output is coupled to the selection signal input end of first multiplexer 521 and the selection signal input end of second multiplexer 522, the reversed-phase output output capacitance activates signal CAP_EN, and one anti-phase enable signal input ENB be used for input phase and pin signal SLK, phase place is pinned signal SLK and is pinned detector by phase place and provided; One the 2nd SR gate latch device 532, comprise a R input, be coupled to the output of hex inverter 516, one S input is coupled to the output of the 4th inverter 514, one noninverting output output bias electric current activates signal ACC_EN, one reversed-phase output, and an anti-phase enable signal input ENB is used for input phase and pins signal SLK; One the 3rd multiplexer 523, comprise one first signal input end, be coupled to the output of first multiplexer 521, one second signal input end is coupled to the output of the 3rd inverter 513, one selection signal input end is coupled to the reversed-phase output of the 2nd SR gate latch device 532, and an output; One the 4th multiplexer 524, comprise one first signal input end, be coupled to the output of second multiplexer 522, one second signal input end is coupled to the output of the 4th inverter 514, one selection signal input end is coupled to the reversed-phase output of the 2nd SR gate latch device 532, and an output; One the 7th inverter 517 comprises an input, is coupled to the output of the 3rd multiplexer 523, and an output; One Three S's R gate latch device 533, comprise a R input, be coupled to the output of the 7th inverter 517, one S input is coupled to the output of the 4th multiplexer 524, one noninverting output is exported the first controlling signal EN_1, and an anti-phase enable signal input ENB is used for input phase and pins signal SLK; An and D type gate latch device (Gated D-Latch) 541, comprise a D input, be coupled to the output of the 4th multiplexer 524, a noninverting output is exported the second controlling signal EN_2, and an anti-phase enable signal input ENB is used for input phase and pins signal SLK.
The one SR gate latch device 531, the 2nd SR gate latch device 532, and the operating characteristic of Three S's R gate latch device 533 is for when anti-phase enable signal input ENB is high level, reversed-phase output and noninverting output are not subjected to the control of S input and R input, when anti-phase enable signal input ENB is low level, reversed-phase output and noninverting output are subjected to the control of S input and R input with normal SR flip-flop mode of operation, that is to say, when phase place pinning signal SLK is high level, a SR gate latch device 531, the 2nd SR gate latch device 532, and the output signal of Three S's R gate latch device 533 all is in lock-out state.The operating characteristic of D type gate latch device 541 is for when anti-phase enable signal input ENB is high level, noninverting output is not subjected to the control of D input, when anti-phase enable signal input ENB is low level, the output of noninverting output equals the input of D input, that is to say, when phase place pinning signal SLK was high level, the output signal of D type gate latch device 541 was in lock-out state.First multiplexer 521, second multiplexer 522, the 3rd multiplexer 523, and the operating characteristic of the 4th multiplexer 524 for when the selection signal input end is high level, output is coupled to first signal input end, when selecting signal input end to be low level, output is coupled to second signal input end.
See also Fig. 6, Fig. 6 is that to activate signal CAP_EN be that to activate signal ACC_EN be decapacitation for activation and bias current to hypothesis electric capacity, when considering the situation of the first controlling signal EN_1 and the second controlling signal EN_2 effect, the work schematic diagram of three relation curves of N end control voltage VN and input control voltage Vctrl, these three relation curves comprise a N and hold the first output voltage curve 610, one N holds the second output voltage curve 620, and a N holds the 3rd output voltage curve 630, wherein, N holds the N end control voltage VN that the first output voltage curve 610 is ordered at A11 to hold the N end that the second output voltage curve 620 is ordered at B12 to control voltage VN greater than N, N holds the N end control voltage VN that the second output voltage curve 620 is ordered at A12 to hold the N end that the 3rd output voltage curve 630 is ordered at B23 to control voltage VN greater than N, N holds the first output voltage curve 610 to be low level situation corresponding to the first controlling signal EN_1 and the second controlling signal EN_2, it is high level and the second controlling signal EN_2 is low level situation corresponding to the first controlling signal EN_1 that N holds the second output voltage curve 620, and N holds the 3rd output voltage curve 630 to be the situation of high level corresponding to the first controlling signal EN_1 and the second controlling signal EN_2.
When input control voltage Vctrl when no-voltage rises, N end control voltage VN holds the working point of the first output voltage curve 610 to move and up increase along N, this is to be low level situation corresponding to the first controlling signal EN_1 and the second controlling signal EN_2, when input control voltage Vctrl is increased to the A1 point voltage, the working point moves to the A11 point, at this moment, the first controlling signal EN_1 and the second controlling signal EN_2 all switch to high level, thereby the working point moves to the A13 point from the A11 point, N end control voltage VN also just and then holds the A11 point voltage of the first output voltage curve 610 to switch to the A13 point voltage that N holds the 3rd output voltage curve 630 from N, thereafter, the working point holds the 3rd output voltage curve 630 to move along N, when input control voltage Vctrl is reduced to the B2 point voltage, the working point moves to the B23 point, the second controlling signal EN_2 switches to low level, thereby the working point is displaced downwardly to the B22 point from the B23 point, thereafter, the working point holds the second output voltage curve 620 to move along N, if input control voltage Vctrl is increased to the A1 point voltage again, the working point moves to the A12 point, the second controlling signal EN_2 switches to high level again, the working point moves to the A13 point on again, if input control voltage Vctrl is reduced to the B1 point voltage, the working point moves to the B12 point, the first controlling signal EN_1 switches to low level, thereby the working point is displaced downwardly to the B11 point from the B12 point, thereafter, the working point holds the first output voltage curve 610 to move along N.
Control the relation of voltage VN and input control voltage Vctrl like the N end as for the relation object of P end control voltage VP and input control voltage Vctrl, just P end control voltage VP descends with the increase of input control voltage Vctrl, activating signal CAP_EN at electric capacity is that to activate signal ACC_EN be under the situation of decapacitation for activation and bias current, its many relation curves comprise the output voltage curve of three declines, just comprise a P and hold the first output voltage curve, one P holds the second output voltage curve, and a P holds the 3rd output voltage curve (not shown), this P holds the first output voltage curve to be low level situation corresponding to the first controlling signal EN_1 and the second controlling signal EN_2, it is high level and the second controlling signal EN_2 is low level situation corresponding to the first controlling signal EN_1 that this P holds the second output voltage curve, this P holds the 3rd output voltage curve to be the situation of high level corresponding to the first controlling signal EN_1 and the second controlling signal EN_2, this P holds the ceiling voltage of the P end control voltage VP of the 3rd output voltage curve to be higher than the minimum voltage that this P holds the P end control voltage VP of the second output voltage curve, this P holds the ceiling voltage of the P end control voltage VP of the second output voltage curve to be higher than the minimum voltage that this P holds the P end control voltage VP of the first output voltage curve, and the similar above-mentioned operation principle of the mobility of working point, so repeat no more.
See also Fig. 7, Fig. 7 is that hypothesis electric capacity activates signal CAP_EN and bias current actuating signal ACC_EN is decapacitation, when considering the situation of the first controlling signal EN_1 and the second controlling signal EN_2 effect, the work schematic diagram of N end control voltage VN and three relation curves of input control voltage Vctrl, these three relation curves comprise a N and hold the 4th output voltage curve 640, a N to hold the 5th output voltage curve 650, reach a N and hold the 6th output voltage curve 660.N holds the 4th output voltage curve 640 to be low level situation corresponding to the first controlling signal EN_1 and the second controlling signal EN_2, it is high level and the second controlling signal EN_2 is low level situation corresponding to the first controlling signal EN_1 that N holds the 5th output voltage curve 650, and N holds the 6th output voltage curve 660 to be the situation of high level corresponding to the first controlling signal EN_1 and the second controlling signal EN_2.Three relation curves of Fig. 7 are three similar relation curves to three relation curves of Fig. 6, just the switched voltage point of working point by B1, the B2 of Fig. 6, and A1 be changed to the 7th figure B2, B3, reach A2, and the described operation principle of the similar Fig. 6 of the mobility of working point, so repeat no more.
In like manner, be under the situation of decapacitation at electric capacity actuating signal CAP_EN and bias current actuating signal ACC_EN, the relation object of P end control voltage VP and input control voltage Vctrl is like the relation of N end control voltage VN and input control voltage Vctrl, just P end control voltage VP descends with the increase of input control voltage Vctrl, its many relation curves comprise the output voltage curve of three declines, just comprise a P and hold the 4th output voltage curve, one P holds the 5th output voltage curve, and a P holds the 6th output voltage curve (not shown), this P holds the 4th output voltage curve to be low level situation corresponding to the first controlling signal EN_1 and the second controlling signal EN_2, it is high level and the second controlling signal EN_2 is low level situation corresponding to the first controlling signal EN_1 that this P holds the 5th output voltage curve, this P holds the 6th output voltage curve to be the situation of high level corresponding to the first controlling signal EN_1 and the second controlling signal EN_2, this P holds the ceiling voltage of the P end control voltage VP of the 6th output voltage curve to be higher than the minimum voltage that this P holds the P end control voltage VP of the 5th output voltage curve, this P holds the ceiling voltage of the P end control voltage VP of the 5th output voltage curve to be higher than the minimum voltage that this P holds the P end control voltage VP of the 4th output voltage curve, and the similar above-mentioned operation principle of the mobility of working point, so repeat no more.
See also Fig. 8, Fig. 8 is that to activate signal CAP_EN be that to activate signal ACC_EN be activation for decapacitation and bias current to hypothesis electric capacity, when considering the situation of the first controlling signal EN_1 and the second controlling signal EN_2 effect, the work schematic diagram of N end control voltage VN and three relation curves of input control voltage Vctrl, these three relation curves comprise a N and hold the 7th output voltage curve 670, a N to hold the 8th output voltage curve 680, reach a N and hold the 9th output voltage curve 690.N holds the 7th output voltage curve 670 to be low level situation corresponding to the first controlling signal EN_1 and the second controlling signal EN_2, it is high level and the second controlling signal EN_2 is low level situation corresponding to the first controlling signal EN_1 that N holds the 8th output voltage curve 680, and N holds the 9th output voltage curve 690 to be the situation of high level corresponding to the first controlling signal EN_1 and the second controlling signal EN_2.Three relation curves of Fig. 8 are three similar relation curves to three relation curves of Fig. 6, just the switched voltage point of working point by B1, the B2 of Fig. 6, and A1 be changed to Fig. 8 B3, B4, reach A3, and the described operation principle of the similar Fig. 6 of the mobility of working point, so repeat no more.
In like manner, activating signal CAP_EN at electric capacity is that to activate signal ACC_EN be under the situation of activation for decapacitation and bias current, the relation object of P end control voltage VP and input control voltage Vctrl is like the relation of N end control voltage VN and input control voltage Vctrl, just P end control voltage VP descends with the increase of input control voltage Vctrl, its many relation curves comprise the output voltage curve of three declines, just comprise P and hold the 7th output voltage curve, P holds the 8th output voltage curve, and P holds the 9th output voltage curve (not shown), this P holds the 7th output voltage curve to be low level situation corresponding to the first controlling signal EN_1 and the second controlling signal EN_2, it is high level and the second controlling signal EN_2 is low level situation corresponding to the first controlling signal EN_1 that this P holds the 8th output voltage curve, this P holds the 9th output voltage curve to be the situation of high level corresponding to the first controlling signal EN_1 and the second controlling signal EN_2, this P holds the ceiling voltage of the P end control voltage VP of the 9th output voltage curve to be higher than the minimum voltage that this P holds the P end control voltage VP of the 8th output voltage curve, this P holds the ceiling voltage of the P end control voltage VP of the 8th output voltage curve to be higher than the minimum voltage that this P holds the P end control voltage VP of the 7th output voltage curve, and the similar above-mentioned operation principle of the mobility of working point, so repeat no more.
See also Fig. 9, Fig. 9 is that the hypothesis first controlling signal EN_1 and the second controlling signal EN_2 are high level, when considering that electric capacity activates the situation of signal CAP_EN and bias current actuating signal ACC_EN effect, the work schematic diagram of the frequency of concussion signal Sosc and three relation curves of input control voltage Vctrl, these three relation curves comprise a first frequency and adjust curve 710, one second frequency is adjusted curve 720, and one the 3rd frequency is adjusted curve 730, wherein, first frequency is adjusted curve 710, and to activate signal CAP_EN corresponding to electric capacity be that to activate signal ACC_EN be the situation of decapacitation for activation and bias current, second frequency is adjusted curve 720 and is activated signal CAP_EN corresponding to electric capacity and activate the situation that signal ACC_EN is decapacitation with bias current, and it is decapacitation and bias current actuating signal ACC_EN is the situation of activation that the 3rd output voltage curve 730 activates signal CAP_EN corresponding to electric capacity.
When input control voltage Vctrl when no-voltage rises, the frequency of concussion signal Sosc moves and up increase along the working point that first frequency is adjusted curve 710, this is that to activate signal CAP_EN corresponding to electric capacity be that to activate signal ACC_EN be the situation of decapacitation for activation and bias current, when input control voltage Vctrl is increased to the A2 point voltage, the working point moves to the A21 point, at this moment, electric capacity activates signal CAP_EN and switches to the decapacitation state, thereby the working point moves to the A22 point from the A21 point, the frequency of concussion signal Sosc also just and then switches to the A22 dot frequency of second frequency adjustment curve 720 from the A21 dot frequency of first frequency adjustment curve 710, thereafter, move along second frequency adjustment curve 720 working point.
When the working point when second frequency is adjusted curve 720 and is moved, this is to activate the situation that signal ACC_EN is decapacitation corresponding to electric capacity actuating signal CAP_EN and bias current, when if input control voltage Vctrl is reduced to the B3 point voltage, the working point moves to the B32 point, electric capacity activates signal CAP_EN and switches to enabled status, thereby the working point is displaced downwardly to the B31 point from the B32 point, and thereafter, the working point is adjusted curve 710 along first frequency and moved; When if input control voltage Vctrl rises to the A3 point voltage, the working point moves to the A31 point, and bias current activates the state that signal ACC_EN switches to activation, thereby the working point moves to the A32 point from the A31 point, thereafter, move along the 3rd frequency adjustment curve 730 working point.
When the working point when the 3rd frequency is adjusted curve 730 and is moved, this is that to activate signal CAP_EN corresponding to electric capacity be that to activate signal ACC_EN be the situation of activation for decapacitation and bias current, when if input control voltage Vctrl is reduced to the B4 point voltage, the working point moves to the B42 point, bias current activates the state that signal ACC_EN switches to decapacitation, thereby the working point is displaced downwardly to the B41 point from the B42 point, and thereafter, the working point is adjusted curve 720 along second frequency and moved.
As the first controlling signal EN_1, the second controlling signal EN_2, electric capacity activates signal CAP_EN, activate signal ACC_EN with bias current and all do the time spent simultaneously, three relation curves by original Fig. 9 between the frequency of concussion signal Sosc and the input control voltage Vctrl increase to nine relation curves, be equivalent in Fig. 9, with two relation curves of the extra downwards increase of each bar relation curve, and these two extra relation curves are between former neighbouring relations curve, therefore cause the situation of the phase-locked failure of phase lock circuitry with regard to avoiding frequency gap as shown in Figure 3 easily, in addition, still can provide wideer frequency lock-in range.
See also Figure 10, Figure 10 shows and considers the first controlling signal EN_1 at the same time, the second controlling signal EN_2, electric capacity activates signal CAP_EN, with the time spent of doing of bias current actuating signal ACC_EN, the work schematic diagram of the frequency of concussion signal Sosc and nine relation curves of input control voltage Vctrl, these nine relation curves comprise a first frequency and adjust curve 810, one second frequency is adjusted curve 820, one the 3rd frequency is adjusted curve 830, one the 4th frequency is adjusted curve 840, one the 5th frequency is adjusted curve 850, one the 6th frequency is adjusted curve 860, one the 7th frequency is adjusted curve 870, one the 8th frequency is adjusted curve 880, and one the 9th frequency is adjusted curve 890.Wherein the 3rd frequency is adjusted the frequency of the concussion signal Sosc that the frequency of the concussion signal Sosc that curve 830 order at A21 must order at B13 greater than the 4th frequency adjustment curve 840; The 6th frequency is adjusted the frequency of the concussion signal Sosc that the frequency of the concussion signal Sosc that curve 860 order at A31 must be greatly must order at B25 in the 7th frequency adjustment curve 870.
First frequency is adjusted curve 810, second frequency is adjusted curve 820, and the 3rd frequency is adjusted curve 830, and to activate signal CAP_EN corresponding to electric capacity be that to activate signal ACC_EN be the situation of decapacitation for activation and bias current, the 4th frequency is adjusted curve 840, the 5th frequency is adjusted curve 850, and the 6th frequency adjustment curve 860 activates signal CAP_EN corresponding to electric capacity and bias current activates the situation that signal ACC_EN is decapacitation, and the 7th frequency is adjusted curve 870, the 8th frequency is adjusted curve 880, and the 9th frequency is adjusted curve 890, and to activate signal CAP_EN corresponding to electric capacity be that to activate signal ACC_EN be the situation of activation for decapacitation and bias current.
First frequency is adjusted curve 810, the 4th frequency is adjusted curve 840, and the 7th frequency adjustment curve 870 is low level situation corresponding to the first controlling signal EN_1 and the second controlling signal EN_2, second frequency is adjusted curve 820, the 5th frequency is adjusted curve 850, and the 8th frequency to adjust curve 880 be high level and the second controlling signal EN_2 is low level situation corresponding to the first controlling signal EN_1, the 3rd frequency is adjusted curve 830, the 6th frequency is adjusted curve 860, and the 9th frequency is adjusted curve 890 is high level corresponding to the first controlling signal EN_1 and the second controlling signal EN_2 situation.
When input control voltage Vctrl when no-voltage rises, the frequency of concussion signal Sosc moves along the working point that first frequency is adjusted curve 810 and up increases, and this is that to activate signal CAP_EN corresponding to electric capacity be that to activate signal ACC_EN be that decapacitation, the first controlling signal EN_1 are that the low level and the second controlling signal EN_2 are low level situation for activation, bias current.When input control voltage Vctrl is increased to the A1 point voltage, the working point moves to the A11 point, at this moment, the first controlling signal EN_1 and the second controlling signal EN_2 all switch to high level, thereby the working point moves to the A13 point from the A11 point, the frequency of concussion signal Sosc also just and then switches to the A13 dot frequency of the 3rd frequency adjustment curve 830 from the A11 dot frequency of first frequency adjustment curve 810, thereafter, the working point is adjusted curve 830 along the 3rd frequency and moved.
When the working point when the 3rd frequency is adjusted curve 830 and is moved, this is that to activate signal CAP_EN corresponding to electric capacity be that to activate signal ACC_EN be that decapacitation, the first controlling signal EN_1 are that the high level and the second controlling signal EN_2 are the situation of high level for activation, bias current.If input control voltage Vctrl is when being reduced to the B2 point voltage, the working point moves to the B22 point, and the second controlling signal EN_2 switches to low level, thereby the working point is displaced downwardly to the B21 point from B22 point, and thereafter, move along second frequency adjustment curve 820 working point; If input control voltage Vctrl is when rising to the A2 point voltage, the working point moves to the A21 point, and electric capacity activates the state that signal CAP_EN switches to decapacitation, thereby the working point moves to the A24 point from A21 point, and thereafter, move along the 6th frequency adjustment curve 860 working point.
When the working point when second frequency is adjusted curve 820 and is moved, this is that to activate signal CAP_EN corresponding to electric capacity be that to activate signal ACC_EN be that decapacitation, the first controlling signal EN_1 are that the high level and the second controlling signal EN_2 are low level situation for activation, bias current.If input control voltage Vctrl is when being reduced to the B1 point voltage, the working point moves to the B12 point, and the first controlling signal EN_1 switches to low level, thereby the working point is displaced downwardly to the B11 point from B12 point, and thereafter, move along first frequency adjustment curve 810 working point; If input control voltage Vctrl is when rising to the A1 point voltage, the working point moves to the A12 point, and the second controlling signal EN_2 switches to the state of high level, thereby the working point moves to the A13 point from A12 point, and thereafter, move along the 3rd frequency adjustment curve 830 working point.
When the working point when the 6th frequency is adjusted curve 860 and is moved, this is that to activate signal CAP_EN corresponding to electric capacity be that to activate signal ACC_EN be that decapacitation, the first controlling signal EN_1 are that the high level and the second controlling signal EN_2 are the situation of high level for decapacitation, bias current.If input control voltage Vctrl is when being reduced to the B3 point voltage, the working point moves to the B32 point, and the second controlling signal EN_2 switches to low level, thereby the working point is displaced downwardly to the B31 point from B32 point, and thereafter, move along the 5th frequency adjustment curve 850 working point; When if input control voltage Vctrl rises to the A3 point voltage, the working point moves to the A31 point, and bias current activates the state that signal ACC_EN switches to activation, thereby the working point moves to the A34 point from the A31 point, thereafter, move along the 9th frequency adjustment curve 890 working point.
When the working point when the 5th frequency is adjusted curve 850 and is moved, this is that to activate signal CAP_EN corresponding to electric capacity be that to activate signal ACC_EN be that decapacitation, the first controlling signal EN_1 are that the high level and the second controlling signal EN_2 are low level situation for decapacitation, bias current.If input control voltage Vctrl is when being reduced to the B2 point voltage, the working point moves to the B24 point, and the first controlling signal EN_1 switches to low level, thereby the working point is displaced downwardly to the B23 point from B24 point, and thereafter, move along the 4th frequency adjustment curve 840 working point; If input control voltage Vctrl is when rising to the A2 point voltage, the working point moves to the A23 point, and the second controlling signal EN_2 switches to the state of high level, thereby the working point moves to the A24 point from A23 point, and thereafter, move along the 6th frequency adjustment curve 860 working point.
When the working point when the 4th frequency is adjusted curve 840 and is moved, this is that to activate signal CAP_EN corresponding to electric capacity be that to activate signal ACC_EN be that decapacitation, the first controlling signal EN_1 are that the low level and the second controlling signal EN_2 are low level situation for decapacitation, bias current.If input control voltage Vctrl is when being reduced to the B1 point voltage, the working point moves to the B13 point, and electric capacity activates the state that signal CAP_EN switches to activation, thereby the working point is displaced downwardly to the B11 point from B13 point, and thereafter, move along first frequency adjustment curve 810 working point; When if input control voltage Vctrl rises to the A2 point voltage, the working point moves to the A22 point, the first controlling signal EN_1 switches to the state of high level and the state that the second controlling signal EN_2 switches to high level, thereby the working point moves to the A24 point from the A22 point, thereafter, move along the 6th frequency adjustment curve 860 working point.
When the working point when the 9th frequency is adjusted curve 890 and is moved, this is that to activate signal CAP_EN corresponding to electric capacity be that to activate signal ACC_EN be that activation, the first controlling signal EN_1 are that the high level and the second controlling signal EN_2 are the situation of high level for decapacitation, bias current.If input control voltage Vctrl is when being reduced to the B4 point voltage, the working point moves to the B42 point, and the second controlling signal EN_2 switches to low level, thereby the working point is displaced downwardly to the B41 point from B42 point, and thereafter, move along the 8th frequency adjustment curve 880 working point.
When the working point when the 8th frequency is adjusted curve 880 and is moved, this is that to activate signal CAP_EN corresponding to electric capacity be that to activate signal ACC_EN be that activation, the first controlling signal EN_1 are that the high level and the second controlling signal EN_2 are low level situation for decapacitation, bias current.If input control voltage Vctrl is when being reduced to the B3 point voltage, the working point moves to the B34 point, and the first controlling signal EN_1 switches to low level, thereby the working point is displaced downwardly to the B33 point from B34 point, and thereafter, move along the 7th frequency adjustment curve 870 working point; If input control voltage Vctrl is when rising to the A3 point voltage, the working point moves to the A33 point, and the second controlling signal EN_2 switches to the state of high level, thereby the working point moves to the A34 point from A33 point, and thereafter, move along the 9th frequency adjustment curve 890 working point.
When the working point when the 7th frequency is adjusted curve 870 and is moved, this is that to activate signal CAP_EN corresponding to electric capacity be that to activate signal ACC_EN be that activation, the first controlling signal EN_1 are that the low level and the second controlling signal EN_2 are low level situation for decapacitation, bias current.When if input control voltage Vctrl is reduced to the B2 point voltage, the working point moves to the B25 point, and bias current activates the state that signal ACC_EN switches to decapacitation, thereby the working point is displaced downwardly to the B23 point from the B25 point, thereafter, move along the 4th frequency adjustment curve 840 working point; When if input control voltage Vctrl rises to the A3 point voltage, the working point moves to the A32 point, the first controlling signal EN_1 switches to the state of high level and the state that the second controlling signal EN_2 switches to high level, thereby the working point moves to the A34 point from the A32 point, thereafter, move along the 9th frequency adjustment curve 890 working point.
In another embodiment of the present invention, bias current can be activated signal ACC_EN and remain on the decapacitation state, and only consider the first controlling signal EN_1, the second controlling signal EN_2, and electric capacity activates the effect of signal CAP_EN, at this moment, the first frequency that the frequency of concussion signal Sosc and six relation curves of input control voltage Vctrl are Figure 10 is adjusted curve 810, second frequency is adjusted curve 820, the 3rd frequency is adjusted curve 830, the 4th frequency is adjusted curve 840, the 5th frequency is adjusted curve 850, and the 6th frequency is adjusted curve 860, the related work principle that these six frequencies are adjusted curve is identical with the described operation principle of Figure 10 basically, just when the working point moves on to the A31 point on the 6th frequency adjustment curve 860, still continue to remain on the 6th frequency and adjust curve 860, all the other operation principles are constant, so repeat no more.
In like manner, in another embodiment of the present invention, electric capacity can be activated signal CAP_EN and remain on the decapacitation state, and only consider the first controlling signal EN_1, the second controlling signal EN_2, and bias current activates the effect of signal ACC_EN, at this moment, the frequency of concussion signal Sosc and six relation curves of input control voltage Vctrl are that the 4th frequency of Figure 10 is adjusted curve 840, the 5th frequency is adjusted curve 850, the 6th frequency is adjusted curve 860, the 7th frequency is adjusted curve 870, the 8th frequency is adjusted curve 880, and the 9th frequency is adjusted curve 890, the related work principle that these six frequencies are adjusted curve is identical with the described operation principle of Figure 10 basically, just when the working point when the 4th frequency adjustment curve 840 moves down into the B13 point, still continue to remain on the 4th frequency and adjust curve 840, all the other operation principles are constant, so repeat no more.
In like manner, in another embodiment of the present invention, bias current can be activated signal ACC_EN and remain on the decapacitation state, electric capacity is activated signal CAP_EN remain on enabled status, and only consider the effect of the first controlling signal EN_1 and the second controlling signal EN_2, at this moment, the first frequency that the frequency of concussion signal Sosc and three relation curves of input control voltage Vctrl are Figure 10 is adjusted curve 810, second frequency is adjusted curve 820, and the 3rd frequency is adjusted curve 830, the related work principle that these three frequencies are adjusted curve is identical with the described operation principle of Figure 10 basically, just when the working point moves on to the A21 point on the 3rd frequency adjustment curve 830, still continue to remain on the 3rd frequency and adjust curve 830, all the other operation principles are constant, so repeat no more.
In like manner, in another embodiment of the present invention, electric capacity can be activated signal CAP_EN and remain on the decapacitation state, bias current is activated signal ACC_EN remain on enabled status, and only consider the effect of the first controlling signal EN_1 and the second controlling signal EN_2, at this moment, the frequency of concussion signal Sosc and three relation curves of input control voltage Vctrl are that the 7th frequency of Figure 10 is adjusted curve 870, the 8th frequency is adjusted curve 880, and the 9th frequency is adjusted curve 890, the related work principle that these three frequencies are adjusted curve is identical with the described operation principle of Figure 10 basically, just when the working point when the 7th frequency adjustment curve 870 moves down into the B25 point, still continue to remain on the 7th frequency and adjust curve 870, all the other operation principles are constant, so repeat no more.
In like manner, in another embodiment of the present invention, electric capacity can be activated signal CAP_EN and remain on the decapacitation state, bias current is activated signal ACC_EN remain on the decapacitation state, and only consider the effect of the first controlling signal EN_1 and the second controlling signal EN_2, at this moment, the frequency of concussion signal Sosc and three relation curves of input control voltage Vctrl are that the 4th frequency of Figure 10 is adjusted curve 840, the 5th frequency is adjusted curve 850, and the 6th frequency is adjusted curve 860, the related work principle that these three frequencies are adjusted curve is identical with the described operation principle of Figure 10 basically, just when the working point when the 4th frequency adjustment curve 840 moves down into the B13 point, still continue to remain on the 4th frequency and adjust curve 840, and when the working point moves on to the A31 point on the 6th frequency adjustment curve 860, still continue to remain on the 6th frequency and adjust curve 860, all the other operation principles are constant, so repeat no more.
So, the automatic multi step frequency adjusting method of the voltage-controlled concussion system of the embodiment of the invention, promptly follow the trail of the frequency adjustment curve of the locking frequency of being wanted automatically, adjust curve, can adjust the desired signal frequency of locking in curve in this frequency when searching desired frequency with above-mentioned step.Adjust curves in three frequencies of Fig. 9 and use 4 switched voltage points (A2, A3, B3, and B4), in like manner analogize, adjust curve if produce nine frequencies, generally need to use 16 switched voltage points, in the preferred embodiment of Figure 10, though have nine frequencies to adjust curves, only use 7 switched voltage points (A1, A2, A3, B1, B2, B3, reach B4).Adjust under the curve number situation in identical frequency, distance is big more between the adjacent more at least switching point voltage of switching point number, that is to say, the voltage error tolerance is big more, and circuit is not easy misoperation more, especially for low-voltage control circuit, available voltage range originally just seldom, add factors such as process drift,, be difficult to guarantee the circuit operate as normal if the switching point number is too many.
The above only is preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.

Claims (50)

1. automatic multi step frequency adjusting method comprises:
One control circuit produces one first controlling signal, one second controlling signal, electric capacity actuating signal and a bias current according to an input control voltage and activates signal;
One voltage to voltage conversion circuit according to this first controlling signal, and this second controlling signal, by selecting one group of output voltage curve in many groups output voltage curve, and, produce N end control voltage and P end control voltage in this group output voltage curve according to this input control voltage; And
One voltage-controlled oscillator (VCO) activates signal, this bias current actuating signal and this voltage to selected this group output voltage curve of voltage conversion circuit according to this electric capacity and produces frequency adjustment curve, and, adjust curve in this frequency and produce a frequency output signal according to this N end control voltage and this P end control voltage.
2. the method for claim 1, be that enabled status and this bias current are when activating signal and being the decapacitation state wherein when this electric capacity activates signal, if when this first controlling signal and this second controlling signal were low level, this voltage to voltage conversion circuit worked in one first group of output voltage curve; If this first controlling signal is high level and this second controlling signal when being low level, this voltage to voltage conversion circuit works in one second group of output voltage curve; If when this first controlling signal and this second controlling signal were high level, this voltage to voltage conversion circuit worked in one the 3rd group of output voltage curve.
3. method as claimed in claim 2, wherein the minimum voltage of the 3rd group of output voltage curve N end control voltage is lower than the ceiling voltage of this second group of output voltage curve N end control voltage, and the minimum voltage of this second group of output voltage curve N end control voltage is lower than the ceiling voltage of this first group of output voltage curve N end control voltage.
4. method as claimed in claim 2, wherein the ceiling voltage of the 3rd group of output voltage curve P end control voltage is higher than the minimum voltage of this second group of output voltage curve P end control voltage, and the ceiling voltage of this second group of output voltage curve P end control voltage is higher than the minimum voltage of this first group of output voltage curve P end control voltage.
5. method as claimed in claim 2, wherein this electric capacity of this first group of output voltage curve fitting activates the enabled status of signal and the decapacitation state that this bias current activates signal, make this voltage-controlled concussion system works adjust curve in a first frequency, this electric capacity of this second group of output voltage curve fitting activates the enabled status of signal and the decapacitation state that this bias current activates signal, make this voltage-controlled concussion system works adjust curve in a second frequency, the 3rd group of this electric capacity of output voltage curve fitting activates the enabled status of signal and the decapacitation state that this bias current activates signal, makes this voltage-controlled concussion system works adjust curve in one the 3rd frequency.
6. method as claimed in claim 5, wherein when this voltage-controlled concussion system works when this first frequency is adjusted curve, if when operating frequency was raised to the maximum operating frequency of this first frequency adjustment curve, this voltage-controlled concussion system works frequency range switched to the 3rd frequency and adjusts curve.
7. method as claimed in claim 5, wherein when this voltage-controlled concussion system works when the 3rd frequency is adjusted curve, if when operating frequency dropped to the lowest operating frequency of the 3rd frequency adjustment curve, this voltage-controlled concussion system works frequency range switched to this second frequency and adjusts curve.
8. method as claimed in claim 5, wherein when this voltage-controlled concussion system works when this second frequency is adjusted curve, if when operating frequency dropped to the lowest operating frequency of this second frequency adjustment curve, this voltage-controlled concussion system works frequency range switched to this first frequency and adjusts curve.
9. method as claimed in claim 5, wherein when this voltage-controlled concussion system works when this second frequency is adjusted curve, if when operating frequency was raised to the maximum operating frequency of this second frequency adjustment curve, this voltage-controlled concussion system works frequency range switched to the 3rd frequency and adjusts curve.
10. method as claimed in claim 5, wherein activate that signal switches to the decapacitation state and this bias current when activating signal and remaining the decapacitation state when this electric capacity, if when this first controlling signal and this second controlling signal were low level, this voltage to voltage conversion circuit worked in one the 4th group of output voltage curve; If this first controlling signal is high level and this second controlling signal when being low level, this voltage to voltage conversion circuit works in one the 5th group of output voltage curve; If when this first controlling signal and this second controlling signal were high level, this voltage to voltage conversion circuit worked in one the 6th group of output voltage curve.
11. method as claimed in claim 10, wherein the minimum voltage of the 6th group of output voltage curve N end control voltage is lower than the ceiling voltage of the 5th group of output voltage curve N end control voltage, and the minimum voltage of the 5th group of output voltage curve N end control voltage is lower than the ceiling voltage of the 4th group of output voltage curve N end control voltage.
12. method as claimed in claim 10, wherein the ceiling voltage of the 6th group of output voltage curve P end control voltage is higher than the minimum voltage of the 5th group of output voltage curve P end control voltage, and the ceiling voltage of the 5th group of output voltage curve P end control voltage is higher than the minimum voltage of the 4th group of output voltage curve P end control voltage.
13. method as claimed in claim 10, wherein the 4th group of this electric capacity of output voltage curve fitting activates the decapacitation state of signal and the decapacitation state that this bias current activates signal, make this voltage-controlled concussion system works adjust curve in one the 4th frequency, the 5th group of this electric capacity of output voltage curve fitting activates the decapacitation state of signal and the decapacitation state that this bias current activates signal, make this voltage-controlled concussion system works adjust curve in one the 5th frequency, the 6th group of this electric capacity of output voltage curve fitting activates the decapacitation state of signal and the decapacitation state that this bias current activates signal, makes this voltage-controlled concussion system works adjust curve in one the 6th frequency.
14. method as claimed in claim 13, wherein when this voltage-controlled concussion system works when the 4th frequency is adjusted curve, if when operating frequency was raised to the maximum operating frequency of the 4th frequency adjustment curve, this voltage-controlled concussion system works frequency range switched to the 6th frequency and adjusts curve; When this voltage-controlled concussion system works when the 6th frequency is adjusted curve, if operating frequency drops to the 6th frequency when adjusting the lowest operating frequency of curve, this voltage-controlled concussion system works frequency range switches to the 5th frequency and adjusts curve; When this voltage-controlled concussion system works when the 5th frequency is adjusted curve, if operating frequency drops to the 5th frequency when adjusting the lowest operating frequency of curve, this voltage-controlled concussion system works frequency range switches to the 4th frequency and adjusts curve; When this voltage-controlled concussion system works when the 5th frequency is adjusted curve, if operating frequency is raised to the 5th frequency when adjusting the maximum operating frequency of curve, this voltage-controlled concussion system works frequency range switches to the 6th frequency and adjusts curve.
15. method as claimed in claim 13, wherein the lowest operating frequency of the 4th frequency adjustment curve is lower than the maximum operating frequency that the 3rd frequency is adjusted curve.
16. method as claimed in claim 13, wherein when this voltage-controlled concussion system works when the 3rd frequency is adjusted curve, when if operating frequency is raised to the maximum operating frequency of the 3rd frequency adjustment curve, this electric capacity activates signal and switches to the decapacitation state, and this voltage-controlled concussion system works frequency range switches to the 6th frequency and adjusts curve.
17. method as claimed in claim 13, wherein this voltage-controlled concussion system works is when the 4th frequency is adjusted curve, when if operating frequency drops to the lowest operating frequency of the 4th frequency adjustment curve, this electric capacity activates signal and switches to enabled status, and this voltage-controlled concussion system works frequency range switches to this first frequency and adjusts curve.
18. method as claimed in claim 13, wherein activate that signal remains the decapacitation state and this bias current when activating signal and switching to enabled status when this electric capacity, if when this first controlling signal and this second controlling signal were low level, this voltage to voltage conversion circuit worked in one the 7th group of output voltage curve; If this first controlling signal is high level and this second controlling signal when being low level, this voltage to voltage conversion circuit works in one the 8th group of output voltage curve; If when this first controlling signal and this second controlling signal were high level, this voltage to voltage conversion circuit worked in one the 9th group of output voltage curve.
19. method as claimed in claim 18, wherein the minimum voltage of the 9th group of output voltage curve N end control voltage is lower than the ceiling voltage of the 8th group of output voltage curve N end control voltage, and the minimum voltage of the 8th group of output voltage curve N end control voltage is lower than the ceiling voltage of the 7th group of output voltage curve N end control voltage.
20. method as claimed in claim 18, wherein the ceiling voltage of the 9th group of output voltage curve P end control voltage is higher than the minimum voltage of the 8th group of output voltage curve P end control voltage, and the ceiling voltage of the 8th group of output voltage curve P end control voltage is higher than the minimum voltage of the 7th group of output voltage curve P end control voltage.
21. method as claimed in claim 18, wherein the 7th group of this electric capacity of output voltage curve fitting activates the decapacitation state of signal and the enabled status that this bias current activates signal, make this voltage-controlled concussion system works adjust curve in one the 7th frequency, the 8th group of this electric capacity of output voltage curve fitting activates the decapacitation state of signal and the enabled status that this bias current activates signal, make this voltage-controlled concussion system works adjust curve in one the 8th frequency, the 9th group of this electric capacity of output voltage curve fitting activates the decapacitation state of signal and the enabled status that this bias current activates signal, makes this voltage-controlled concussion system works adjust curve in one the 9th frequency.
22. method as claimed in claim 21, wherein when this voltage-controlled concussion system works when the 7th frequency is adjusted curve, if when operating frequency was raised to the maximum operating frequency of the 7th frequency adjustment curve, this voltage-controlled concussion system works frequency range switched to the 9th frequency and adjusts curve; When this voltage-controlled concussion system works when the 9th frequency is adjusted curve, if operating frequency drops to the 9th frequency when adjusting the lowest operating frequency of curve, this voltage-controlled concussion system works frequency range switches to the 8th frequency and adjusts curve; When this voltage-controlled concussion system works when the 8th frequency is adjusted curve, if operating frequency drops to the 8th frequency when adjusting the lowest operating frequency of curve, this voltage-controlled concussion system works frequency range switches to the 7th frequency and adjusts curve; When this voltage-controlled concussion system works when the 8th frequency is adjusted curve, if operating frequency is raised to the 8th frequency when adjusting the maximum operating frequency of curve, this voltage-controlled concussion system works frequency range switches to the 9th frequency and adjusts curve.
23. method as claimed in claim 21, wherein the lowest operating frequency of the 7th frequency adjustment curve is lower than the maximum operating frequency that the 6th frequency is adjusted curve.
24. method as claimed in claim 21, wherein when this voltage-controlled concussion system works when the 6th frequency is adjusted curve, when if operating frequency is raised to the maximum operating frequency of the 6th frequency adjustment curve, this bias current activates signal and switches to enabled status, and this voltage-controlled concussion system works frequency range switches to the 9th frequency and adjusts curve.
25. method as claimed in claim 21, wherein this voltage-controlled concussion system works is when the 7th frequency is adjusted curve, when if operating frequency drops to the lowest operating frequency of the 7th frequency adjustment curve, this bias current activates signal and switches to the decapacitation state, and this voltage-controlled concussion system works frequency range switches to the 4th frequency and adjusts curve.
26. the method for claim 1, be that decapacitation state and this bias current are when activating signal and being the decapacitation state wherein when this electric capacity activates signal, if when this first controlling signal and this second controlling signal were low level, this voltage to voltage conversion circuit worked in one the 4th group of output voltage curve; If this first controlling signal is high level and this second controlling signal when being low level, this voltage to voltage conversion circuit works in one the 5th group of output voltage curve; If when this first controlling signal and this second controlling signal were high level, this voltage to voltage conversion circuit worked in one the 6th group of output voltage curve.
27. method as claimed in claim 26, wherein the minimum voltage of the 6th group of output voltage curve N end control voltage is lower than the ceiling voltage of the 5th group of output voltage curve N end control voltage, and the minimum voltage of the 5th group of output voltage curve N end control voltage is lower than the ceiling voltage of the 4th group of output voltage curve N end control voltage.
28. method as claimed in claim 26, wherein the ceiling voltage of the 6th group of output voltage curve P end control voltage is higher than the minimum voltage of the 5th group of output voltage curve P end control voltage, and the ceiling voltage of the 5th group of output voltage curve P end control voltage is higher than the minimum voltage of the 4th group of output voltage curve P end control voltage.
29. method as claimed in claim 26, wherein the 4th group of this electric capacity of output voltage curve fitting activates the decapacitation state of signal and the decapacitation state that this bias current activates signal, make this voltage-controlled concussion system works adjust curve in one the 4th frequency, the 5th group of this electric capacity of output voltage curve fitting activates the decapacitation state of signal and the decapacitation state that this bias current activates signal, make this voltage-controlled concussion system works adjust curve in one the 5th frequency, the 6th group of this electric capacity of output voltage curve fitting activates the decapacitation state of signal and the decapacitation state that this bias current activates signal, makes this voltage-controlled concussion system works adjust curve in one the 6th frequency.
30. method as claimed in claim 26, wherein when this voltage-controlled concussion system works when the 4th frequency is adjusted curve, if when operating frequency was raised to the maximum operating frequency of the 4th frequency adjustment curve, this voltage-controlled concussion system works frequency range switched to the 6th frequency and adjusts curve; When this voltage-controlled concussion system works when the 6th frequency is adjusted curve, if operating frequency drops to the 6th frequency when adjusting the lowest operating frequency of curve, this voltage-controlled concussion system works frequency range switches to the 5th frequency and adjusts curve; When this voltage-controlled concussion system works when the 5th frequency is adjusted curve, if operating frequency drops to the 5th frequency when adjusting the lowest operating frequency of curve, this voltage-controlled concussion system works frequency range switches to the 4th frequency and adjusts curve; When this voltage-controlled concussion system works when the 5th frequency is adjusted curve, if operating frequency is raised to the 5th frequency when adjusting the maximum operating frequency of curve, this voltage-controlled concussion system works frequency range switches to the 6th frequency and adjusts curve.
31. method as claimed in claim 29, wherein activate that signal remains the decapacitation state and this bias current when activating signal and switching to enabled status when this electric capacity, if when this first controlling signal and this second controlling signal were low level, this voltage to voltage conversion circuit worked in one the 7th group of output voltage curve; If this first controlling signal is high level and this second controlling signal when being low level, this voltage to voltage conversion circuit works in one the 8th group of output voltage curve; If when this first controlling signal and this second controlling signal were high level, this voltage to voltage conversion circuit worked in one the 9th group of output voltage curve.
32. method as claimed in claim 31, wherein the minimum voltage of the 9th group of output voltage curve N end control voltage is lower than the ceiling voltage of the 8th group of output voltage curve N end control voltage, and the minimum voltage of the 8th group of output voltage curve N end control voltage is lower than the ceiling voltage of the 7th group of output voltage curve N end control voltage.
33. method as claimed in claim 31, wherein the ceiling voltage of the 9th group of output voltage curve P end control voltage is higher than the minimum voltage of the 8th group of output voltage curve P end control voltage, and the ceiling voltage of the 8th group of output voltage curve P end control voltage is higher than the minimum voltage of the 7th group of output voltage curve P end control voltage.
34. method as claimed in claim 31, wherein the 7th group of this electric capacity of output voltage curve fitting activates the decapacitation state of signal and the enabled status that this bias current activates signal, make this voltage-controlled concussion system works adjust curve in one the 7th frequency, the 8th group of this electric capacity of output voltage curve fitting activates the decapacitation state of signal and the enabled status that this bias current activates signal, make this voltage-controlled concussion system works adjust curve in one the 8th frequency, the 9th group of this electric capacity of output voltage curve fitting activates the decapacitation state of signal and the enabled status that this bias current activates signal, makes this voltage-controlled concussion system works adjust curve in one the 9th frequency.
35. method as claimed in claim 34, wherein when this voltage-controlled concussion system works when the 7th frequency is adjusted curve, if when operating frequency was raised to the maximum operating frequency of the 7th frequency adjustment curve, this voltage-controlled concussion system works frequency range switched to the 9th frequency and adjusts curve; When this voltage-controlled concussion system works when the 9th frequency is adjusted curve, if operating frequency drops to the 9th frequency when adjusting the lowest operating frequency of curve, this voltage-controlled concussion system works frequency range switches to the 8th frequency and adjusts curve; When this voltage-controlled concussion system works when the 8th frequency is adjusted curve, if operating frequency drops to the 8th frequency when adjusting the lowest operating frequency of curve, this voltage-controlled concussion system works frequency range switches to the 7th frequency and adjusts curve; When this voltage-controlled concussion system works when the 8th frequency is adjusted curve, if operating frequency is raised to the 8th frequency when adjusting the maximum operating frequency of curve, this voltage-controlled concussion system works frequency range switches to the 9th frequency and adjusts curve.
36. method as claimed in claim 34, wherein the lowest operating frequency of the 7th frequency adjustment curve is lower than the maximum operating frequency that the 6th frequency is adjusted curve.
37. method as claimed in claim 34, wherein when this voltage-controlled concussion system works when the 6th frequency is adjusted curve, when if operating frequency is raised to the maximum operating frequency of the 6th frequency adjustment curve, this bias current activates signal and switches to enabled status, and this voltage-controlled concussion system works frequency range switches to the 9th frequency and adjusts curve.
38. method as claimed in claim 34, wherein this voltage-controlled concussion system works is when the 7th frequency is adjusted curve, when if operating frequency drops to the lowest operating frequency of the 7th frequency adjustment curve, this bias current activates signal and switches to the decapacitation state, and this voltage-controlled concussion system works frequency range switches to the 4th frequency and adjusts curve.
39. the method for claim 1, be that decapacitation state and this bias current are when activating signal and being enabled status wherein when this electric capacity activates signal, if when this first controlling signal and this second controlling signal were low level, this voltage to voltage conversion circuit worked in one the 7th group of output voltage curve; If this first controlling signal is high level and this second controlling signal when being low level, this voltage to voltage conversion circuit works in one the 8th group of output voltage curve; If when this first controlling signal and this second controlling signal were high level, this voltage to voltage conversion circuit worked in one the 9th group of output voltage curve.
40. method as claimed in claim 39, wherein the minimum voltage of the 9th group of output voltage curve N end control voltage is lower than the ceiling voltage of the 8th group of output voltage curve N end control voltage, and the minimum voltage of the 8th group of output voltage curve N end control voltage is lower than the ceiling voltage of the 7th group of output voltage curve N end control voltage.
41. method as claimed in claim 39, wherein the ceiling voltage of the 9th group of output voltage curve P end control voltage is higher than the minimum voltage of the 8th group of output voltage curve P end control voltage, and the ceiling voltage of the 8th group of output voltage curve P end control voltage is higher than the minimum voltage of the 7th group of output voltage curve P end control voltage.
42. method as claimed in claim 39, wherein the 7th group of this electric capacity of output voltage curve fitting activates the decapacitation state of signal and the enabled status that this bias current activates signal, make this voltage-controlled concussion system works adjust curve in one the 7th frequency, the 8th group of this electric capacity of output voltage curve fitting activates the decapacitation state of signal and the enabled status that this bias current activates signal, make this voltage-controlled concussion system works adjust curve in one the 8th frequency, the 9th group of this electric capacity of output voltage curve fitting activates the decapacitation state of signal and the enabled status that this bias current activates signal, makes this voltage-controlled concussion system works adjust curve in one the 9th frequency.
43. method as claimed in claim 42, wherein when this voltage-controlled concussion system works when the 7th frequency is adjusted curve, if when operating frequency was raised to the maximum operating frequency of the 7th frequency adjustment curve, this voltage-controlled concussion system works frequency range switched to the 9th frequency and adjusts curve; When this voltage-controlled concussion system works when the 9th frequency is adjusted curve, if operating frequency drops to the 9th frequency when adjusting the lowest operating frequency of curve, this voltage-controlled concussion system works frequency range switches to the 8th frequency and adjusts curve; When this voltage-controlled concussion system works when the 8th frequency is adjusted curve, if operating frequency drops to the 8th frequency when adjusting the lowest operating frequency of curve, this voltage-controlled concussion system works frequency range switches to the 7th frequency and adjusts curve; When this voltage-controlled concussion system works when the 8th frequency is adjusted curve, if operating frequency is raised to the 8th frequency when adjusting the maximum operating frequency of curve, this voltage-controlled concussion system works frequency range switches to the 9th frequency and adjusts curve.
44. an automatic multi step frequency Adjustment System comprises:
One control circuit, in order to receiving an input control voltage, and according to this input control voltage produce one first controlling signal, one second controlling signal, an electric capacity activates signal and a bias current activates signal;
One voltage is to voltage conversion circuit, have many group output voltage curves, in order to receive this input control voltage, this first controlling signal and this second controlling signal, according to this first controlling signal, and this second controlling signal, by selecting one group of output voltage curve in many groups output voltage curve, according to this input control voltage, produce N end control voltage and P end control voltage again; And
One voltage-controlled oscillator (VCO), activate signal in order to receive this N end control voltage, this P end control voltage, this electric capacity actuating signal and this bias current, and according to this electric capacity activate signal, this bias current activates signal and this voltage to selected this group output voltage curve of voltage conversion circuit produces frequency adjustment curve, and, adjust curve in this frequency and produce a frequency output signal according to this N end control voltage and this P end control voltage.
45. system as claimed in claim 44, wherein this control circuit comprises:
One Yi Shi Mite circuits for triggering comprise an input, are used for receiving this input control voltage, and an output;
One first inverter comprises an input, is coupled to this output of the reverse circuits for triggering of this Yi Shi Mite, and an output;
One Er Shi Mite circuits for triggering comprise an input, are used for receiving this input control voltage, and an output;
One second inverter comprises an input, is coupled to this output of the reverse circuits for triggering of this Er Shi Mite, and an output;
One the 3rd Shi Mite circuits for triggering comprise an input, are used for receiving this input control voltage, and an output;
One the 3rd inverter comprises an input, is coupled to this output of the reverse circuits for triggering of the 3rd Shi Mite, and an output;
The close special circuits for triggering of one histories of the village, the commune, the factory and the family comprise an input, are used for receiving this input control voltage, and an output;
One the 4th inverter comprises an input, is coupled to this output of the reverse circuits for triggering of this histories of the village, the commune, the factory and the family Mi Te, and an output;
One the 5th inverter comprises an input, is coupled to this output of this first inverter, and an output;
One hex inverter comprises an input, is coupled to this output of this second inverter, and an output;
One first multiplexer comprises one first signal input end, is coupled to this output of this first inverter, and one second signal input end is coupled to this output of this second inverter, and one selects a signal input end and an output;
One second multiplexer comprises one first signal input end, is coupled to this output of this second inverter, and one second signal input end is coupled to this output of the 3rd inverter, and one selects a signal input end and an output;
One the one SR gate latch device, comprise a R input, be coupled to this output of the 5th inverter, one S input is coupled to this output of the 3rd inverter, one reversed-phase output is coupled to this selection signal input end of this first multiplexer and this selection signal input end of this second multiplexer, this reversed-phase output is exported this electric capacity and is activated signal, and an anti-phase enable signal input;
One the 2nd SR gate latch device comprises a R input, is coupled to this output of this hex inverter, one S input is coupled to this output of the 4th inverter, one noninverting output is exported this bias current and is activated signal, a reversed-phase output, and an anti-phase enable signal input;
One the 3rd multiplexer, comprise one first signal input end, be coupled to this output of this first multiplexer, one second signal input end is coupled to this output of the 3rd inverter, one selection signal input end is coupled to this reversed-phase output of the 2nd SR gate latch device, and an output;
One the 4th multiplexer, comprise one first signal input end, be coupled to this output of this second multiplexer, one second signal input end is coupled to this output of the 4th inverter, one selection signal input end is coupled to this reversed-phase output of the 2nd SR gate latch device, and an output;
One the 7th inverter comprises an input, is coupled to this output of the 3rd multiplexer, and an output;
One Three S's R gate latch device, comprise a R input, be coupled to this output of the 7th inverter, a S input is coupled to this output of the 4th multiplexer, one noninverting output is exported this first controlling signal, and an anti-phase enable signal input; And
One D type gate latch device comprises a D input, is coupled to this output of the 4th multiplexer, and a noninverting output is exported this second controlling signal, and an anti-phase enable signal input.
46. system as claimed in claim 45, wherein these Yi Shi Mite circuits for triggering, these Er Shi Mite circuits for triggering, the 3rd Shi Mite circuits for triggering and the close special circuits for triggering of this histories of the village, the commune, the factory and the family are anti-phase Shi Mite circuits for triggering.
47. system as claimed in claim 45, wherein this first multiplexer, this second multiplexer, the 3rd multiplexer and the 4th multiplexer are 2 * 1 multiplexers.
48. system as claimed in claim 45, wherein when the selection signal input end of arbitrary multiplexer is high level, its output is coupled to its first signal input end, and when the selection signal input end of arbitrary multiplexer was low level, its output was coupled to its second signal input end.
49. system as claimed in claim 45, wherein the anti-phase enable signal input of a SR gate latch device, the 2nd SR gate latch device, this Three S's R gate latch device and this D type gate latch device is used for input phase and pins signal.
50. system as claimed in claim 49, wherein when the phase place pinning signal of the arbitrary gate latch device of input was the signal of a high level, its output was in latch mode and not influenced by input signal.
CNA2006101625829A 2006-11-28 2006-11-28 Automatic multi-folded step frequency adjustment for pressure control oscillator Pending CN101192828A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108445397A (en) * 2018-02-01 2018-08-24 宁德时代新能源科技股份有限公司 Parameter selection method and device for insulation detection circuit and storage medium
WO2022095404A1 (en) * 2020-11-05 2022-05-12 北京奕斯伟计算技术有限公司 Voltage controlled oscillator and control method thereof, and p2p interface circuit and electronic device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108445397A (en) * 2018-02-01 2018-08-24 宁德时代新能源科技股份有限公司 Parameter selection method and device for insulation detection circuit and storage medium
US10895593B2 (en) 2018-02-01 2021-01-19 Contemporary Amperex Technology Co., Limited Parameter selection method and apparatus, and storage medium for insulation detection circuit
WO2022095404A1 (en) * 2020-11-05 2022-05-12 北京奕斯伟计算技术有限公司 Voltage controlled oscillator and control method thereof, and p2p interface circuit and electronic device
US11742837B2 (en) 2020-11-05 2023-08-29 Beijing Eswin Computing Technology Co., Ltd. Voltage controlled oscillator and control method thereof, P2P interface circuit, electronic device

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