CN105281771B - For the bipolarity voltage controlled oscillator and its control method in R/D converters - Google Patents
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Abstract
The present invention relates to a kind of bipolarity voltage controlled oscillators and its control method in R/D converters, including integrator circuit, the input terminal of the integrator circuit is connected with external voltage source, its output end respectively with anti-fault protection circuit, double threshold comparison circuit is connected with polarity detection circuit, the output end of anti-fault protection circuit is connected with the control terminal of integrator circuit, the output end of double threshold comparison circuit is connected through the first monostable pulses shaping circuit with the input terminal of the second monostable pulses shaping circuit, the output end of polarity detection circuit is connected with the electric discharge of bidirectional constant source circuit selection control terminal, the output end of bidirectional constant source circuit is connected through discharge loop control circuit with the input terminal of integrator circuit, the output end of first monostable pulses shaping circuit is connected with the control terminal of discharge loop control circuit.The present invention can receive the input of bipolarity DC voltage, realize the technology requirement for being continuously tracked that bipolarity voltage controlled oscillator should have needed for type R/D converters.
Description
Technical field
The present invention relates to R/D converter analogs-figure tracking loop circuit design fields, and in particular to a kind of to turn for R/D
Bipolarity voltage controlled oscillator in parallel operation and its control method.
Background technology
R/D converters are one of the Primary Components in shaft angle servo-control system, are used in systems to position/angles mould
The digitlization of analog quantity is converted, and is connect with host computer by standard interface circuit, realizes the real-time reading of data information.R/D turns
Parallel operation is applied in the important weapons systems such as space flight, aviation, weapons, naval vessel, is also widely used in numerically-controlled machine tool servo mechanism, vapour
Numerous people such as the measurement of vehicle electric power steering, engine movements Detection & Controling and scanning, search, positioning, navigation, measurement
With SERVO CONTROL field.
Type conversion circuit is continuously tracked in R/D converter category analog/digitals, therefore is tracked in the analog to digital of R/D converters
In loop circuit, a kind of special voltage controlled oscillator must be designed：It requires and receives the input of bipolarity DC voltage, generate TTL electricity
Straight and even logic digit pulse output, and the characteristic that pulse frequency is directly proportional to input voltage absolute amplitude；In addition, can according to rear class
The inverse logic control for counting latch circuit needs, which should also have following specific function：Arteries and veins is counted in output
The failing edge for rushing BUSY generates latch pulse LATCH, the polarity according to input voltage, generates the TTL of control plus/minus counting direction
Logic level DIR signals receive externally input disable signal INHIBIT, can forbid the generation of LATCH pulse, and not shadow
Ring the normal output of BUSY pulses.
Currently, conventional voltage controlled oscillator design cannot be satisfied the above-mentioned specific demand of R/D converters, such as AD companies of the U.S.
Voltage controlled oscillator AD560, control source be unipolarity, and without count pulse BUSY, latch pulse LATCH, counting direction
Logic level DIR signals etc., it is therefore necessary to design a kind of bipolarity voltage controlled oscillator meeting R/D converter track demands.
Invention content
The purpose of the present invention is to provide one kind capable of receiving the input of bipolarity DC voltage, generates Transistor-Transistor Logic level positive logic
Digit pulse export, and pulse frequency it is directly proportional to input voltage absolute amplitude be used for R/D converters in bipolarity it is voltage-controlled
Oscillator and its control method.
To achieve the above object, present invention employs following technical schemes：
A kind of bipolarity voltage controlled oscillator in R/D converters, including integrator circuit, double threshold comparison circuit,
First monostable pulses shaping circuit, discharge loop control circuit, the second monostable pulses shaping circuit, polarity detection circuit,
Bidirectional constant source circuit and anti-fault protection circuit；The input terminal of the integrator circuit is connected with voltage source, output end point
It is not connected with anti-fault protection circuit, double threshold comparison circuit and polarity detection circuit, the output of the anti-fault protection circuit
End is connected with integrator circuit discharge switch control terminal, and the output end of the double threshold comparison circuit is whole through the first monostable pulses
Shape circuit is connected with the input terminal of the second monostable pulses shaping circuit, the output end and bidirectional constant of the polarity detection circuit
Source circuit selecting switch control terminal is connected, and the output end of bidirectional constant source circuit is through discharge loop control circuit and integrator circuit
Input terminal be connected, the output end of the first monostable pulses shaping circuit and the input terminal phase of discharge loop control circuit
Even.
Further, the integrator circuit includes integrated transporting discharging U0A, single-pole double-throw switch (SPDT) K3, resistance R2 and capacitance C1,
The in-phase input end of the integrated transporting discharging U0A is grounded, and reverse input end is connected through resistance R1 with external voltage source, output end
It is connected with the moved end of single-pole double-throw switch (SPDT) K3 through resistance R2, the non-moving end of single-pole double-throw switch (SPDT) K3 is reversed with integrated transporting discharging U0A's
Input terminal be connected, the output end of integrated transporting discharging U0A is connected with the input terminal of anti-fault protection circuit, one end of the capacitance C1 and
The reverse input end of integrated transporting discharging U0A is connected, and the other end is connected with the output end of integrated transporting discharging U0A.
Further, the double threshold comparison circuit includes comparator U1A and comparator U1B, and the comparator U1A's is same
Be connected respectively with input voltage source to the reverse input end of input terminal and comparator U1B, the reverse input end of comparator U1A with than
In-phase input end compared with device U1B is connected with the output end of integrator circuit, and the output end of comparator U1B is with comparator U1A's
The input terminal of output end and the first monostable pulses shaping circuit is connected, and the output end of comparator U1A is through resistance R4 and power supply VCC
It is connected.
Further, the first monostable pulses shaping circuit uses monostable flipflop U4A, second monostable
Pulse shaper is more electric using the input failing edge and double threshold of monostable flipflop U4B, the monostable flipflop U4A
The output end on road is connected, and input rising edge is connected with the output end of monostable flipflop U4B, and monostable flipflop U4B's is defeated
Enter failing edge ground connection, input rising edge is connected with the output end of monostable flipflop U4A.
Further, the polarity detection circuit includes comparator U3C, resistance R5, R6, R7, R8, R9, R10, diode
The in-phase input end of D1, the comparator U3C through resistance R7 be grounded, reverse input end after resistance R5 and R6 parallel connection with integral
The output end of device circuit is connected, and output end is connected through resistance R9 with the anode of diode D1, and the cathode of diode D1 is through resistance
R10 is grounded, and the cathode of the diode D1 is signal output end.
Further, the discharge loop control circuit uses single-pole double-throw switch (SPDT) K1, the bidirectional constant source circuit packet
Include single-pole double-throw switch (SPDT) K2, resistance R41 and R3, the control terminal of the single-pole double-throw switch (SPDT) K1 and the first monostable pulses shaping electricity
The output end on road is connected, and non-moving end is connected with the reverse input end of integrator circuit, the moved end of the single-pole double-throw switch (SPDT) K2
It is connected with the moved end of single-pole double-throw switch (SPDT) K1, non-moving end is connected through resistance R3, R41 with input voltage source respectively, the hilted broadsword
The control terminal of commutator K2 is connected with the output end of polarity detection circuit.
Further, the anti-fault protection circuit includes comparator U2A, U2B and XOR gate U5, the comparator U2A
In-phase input end and the reverse input end of comparator U2B be connected respectively with input voltage source, the reverse input end of comparator U2A
It is connected with the output end of integrator circuit with the in-phase input end of comparator U2B, the output end of the comparator U2A and U2B
It is connected with the input terminal of XOR gate U5, the control terminal phase of the output end of XOR gate U5 and single-pole double-throw switch (SPDT) K3 in integrator circuit
Even.
A kind of control method for the bipolarity voltage controlled oscillator in R/D converters includes the following steps：
（1）The Ui inputs of bipolarity DC voltage, the resistance R1 being concatenated, to the integral electricity of the active integrator U0A
Hold C1 and carries out two-way charging, the output voltage opposite with Ui polarity of voltages；
（2）The bidirectional output voltage that capacitance C1 chargings obtain, window of the input by+1.1V and -1.1V as double comparison thresholds
Mouth comparator U1A and U1B, the window comparator generate the negative saltus step pulse falling edge by logical one to logical zero；
（3）The negative saltus step pulse falling edge, input integral type monostable pulses shaping circuit U4A make U4A export Q
End, which generates, counts pulse BUSY signals, and pulse width is determined by the time constant of R13 and C3, and the non-ends U4A output Q generate logic and open
OFF signal K1；
（4）Logical switching signal K1 controls positive and negative constant flow source discharge loop, the bi-directional voltage that capacitance C1 chargings are obtained into
Row electric discharge back to zero, generates the bipolarity sawtooth signal；
（5）Logical switching signal K1 inputs monostable pulses shaping circuit U4B again, and the ends U4B output Q is made to generate latch pulse
LATCH signals, pulse width are determined by the time constant of R12 and C2, after the U4B inputs disable signal INHIBIT, lock
Pulse LATCH signals are deposited to be eliminated；
（6）Bipolarity sawtooth signal inputs hysteresis loop comparator U3C, through diode D1 rectifications, generates TTL logic levels K2
And the output of DIR signals, for selecting positive and negative constant flow source course of discharge, the charging voltage of integrating capacitor C1 is made to be discharged back to zero；
（7）The bidirectional output voltage that capacitance C1 chargings obtain, window of the input by+1.6V and -1.6V as double comparison thresholds
Mouth comparator U2A and U2B generate logic high, and the logical switching signal for preventing the voltage-controlled blocking of oscillator is generated through XOR gate U5
K3；
（8）Logical switching signal K3 control discharge loops put the both ends charging voltage of integrating capacitor C1 through resistance R2
Electric back to zero, to prevent voltage controlled oscillator failure of oscillation state from occurring.
As shown from the above technical solution, the present invention can receive the input of bipolarity DC voltage, generate Transistor-Transistor Logic level positive logic
Pulse BUSY signals and the output of latch pulse LATCH signals are counted, and pulse frequency is directly proportional to input voltage absolute amplitude；Together
When, according to the polarity of bipolarity sawtooth signal, the output of logic level DIR signals is generated, realizes and type R/D conversions is continuously tracked
The technology requirement that bipolarity voltage controlled oscillator should have needed for device.
Description of the drawings
Fig. 1 is the circuit block diagram of the present invention；
Fig. 2 is the circuit diagram of the present invention；
Fig. 3 is each unit circuit input/output a, b, c, d, e, f point waveform diagram in Fig. 1.
Specific implementation mode
The present invention will be further described below in conjunction with the accompanying drawings：
As shown in Figure 1, the bipolarity voltage controlled oscillator being used in R/D converters of the present embodiment, including integrator circuit
1, double threshold comparison circuit 2, the first monostable pulses shaping circuit 3, discharge loop control circuit 4, the second monostable pulses are whole
Shape circuit 5, polarity detection circuit 6, bidirectional constant source circuit 7 and anti-fault protection circuit 8；The input terminal of integrator circuit 1 with
Voltage source is connected, and output end is connected with anti-fault protection circuit 8, double threshold comparison circuit 2 and polarity detection circuit 6 respectively,
The output end of anti-fault protection circuit 8 is connected with the discharge switch control terminal of integrator circuit 1, double threshold comparison circuit 2 it is defeated
Outlet is connected through the first monostable pulses shaping circuit 3 with the input terminal of the second monostable pulses shaping circuit 5, Check up polarity electricity
The output end on road 6 is connected with the selecting switch control terminal of bidirectional constant source circuit 7, and the output end of bidirectional constant source circuit 7 is through putting
Electrical circuit control circuit 4 is connected with the reverse input end of integrator circuit 1, the output end of the first monostable pulses shaping circuit 3
It is connected with the switch control terminal of discharge loop control circuit 4.
Integrator circuit 1, for receiving the bipolarity DC voltage Ui inputs, the resistance being concatenated is to the product
Capacitance is divided to carry out two-way charging output；Double threshold comparison circuit 2, for receives 1 output charging voltage signal, generate described in
Negative saltus step pulse falling edge；Monostable pulses shaping circuit 3, the negative saltus step pulse falling edge signal for receiving 2 outputs, generates
The counting pulse BUSY signals output and logical switching signal K1；Discharge loop control circuit 4, for receiving 3 outputs
Signal K1, circuit between connecting 1 and 7；Monostable pulses shaping circuit 5, the signal K1 for receiving 3 outputs, generates and latches arteries and veins
The output of LATCH signals is rushed, after inputting disable signal INHIBIT, latch pulse LATCH signals are eliminated；Polarity detection circuit 6,
Charging voltage signal for receiving 1 output generates the output of TTL logic level K2 and DIR signals through hysteresis loop comparator；It is two-way
Constant-current source circuit 7, the K2 signals for receiving 6 outputs, selects positive and negative constant flow source course of discharge, makes the charging electricity of integrating capacitor C1
Pressure is discharged back to zero；Anti- fault protection circuit 8, the charging level signal for receiving 1 output export logic through window comparator
High level, then logical switching signal K3 is generated through 74HC86 XOR gates, control 1 discharge circuit integrating capacitor both ends are carried out it is short
Road electric discharge back to zero.
As shown in Fig. 2, integrator circuit 1 includes integrated transporting discharging U0A, single-pole double-throw switch (SPDT) K3, resistance R2 and capacitance C1, collection
Be grounded at the in-phase input end of amplifier U0A, reverse input end is connected through resistance R1 with voltage source, output end through resistance R2 and
The moved end of single-pole double-throw switch (SPDT) K3 is connected, the non-moving end of the single-pole double-throw switch (SPDT) K3 reverse input end with integrated transporting discharging U0A respectively,
The output end of integrated transporting discharging U0A is connected with the input terminal of anti-fault protection circuit 8, and one end of capacitance C1 is with integrated transporting discharging U0A's
Reverse input end is connected, and the other end is connected with the output end of integrated transporting discharging U0A.The integrator circuit 1 receives bipolarity direct current
Such as a waveforms of Fig. 3, the resistance R1 being concatenated carries out the integrating capacitor C1 of the active integrator LM148 for voltage Ui inputs
Charging, when Ui voltages are positive polarity, integrator circuit output is negative voltage, when Ui voltages are negative polarity, integrator circuit
Output is positive voltage, such as the b waveforms of attached drawing 3.
Double threshold comparison circuit 2 includes comparator U1A and comparator U1B, the noninverting input and comparator of comparator U1A
The reverse input end of U1B is connected with input voltage source respectively, and the reverse input end of comparator U1A is same mutually defeated with comparator U1B's
Enter end to be connected with the output end of integrator circuit 1, the output end of comparator U1B and the output end of comparator U1A and first are single
The input terminal of steady-state pulse shaping circuit 3 is connected, and the output end of comparator U1A is connected through resistance R4 with power supply VCC.The double threshold
Comparison circuit 2 receives the b voltages of the output of integrator circuit 1, and input is by+1.1V and -1.1V as double comparison thresholds
LM319 window comparator U1A or U1B generate the negative saltus step pulse falling edge, such as the c waveforms of Fig. 3.
First monostable pulses shaping circuit 3 uses monostable flipflop U4A, the second monostable pulses shaping circuit 5 to adopt
It is connected with the output end of comparator U1B with the input failing edge of monostable flipflop U4B, monostable flipflop U4A, in input
It rises along being connected with the output end of monostable flipflop U4B, the input failing edge ground connection of monostable flipflop U4B, input rises
Edge is connected with the output end of monostable flipflop U4A.The monostable pulses shaping circuit 3 receives the output of double threshold comparison circuit 2
C voltages, input 74HC123 integral form monostable pulses shaping circuit U4A, U4A outputs Q ends made to generate the counting pulse
BUSY signals, such as the d waveforms of Fig. 2, pulse width is determined by the time constant of R13 and C3, and U4A exports the non-ends Q and generates logic
Switching signal K1, for controlling the discharge loop control circuit 4.Monostable pulses shaping circuit 5, receives monostable pulses
The K1 signals that shaping circuit 3 exports input monostable pulses shaping circuit U4B, and the ends U4B output Q is made to generate the latch arteries and veins
LATCH signals are rushed, such as the e waveforms of Fig. 3, pulse width is determined by the time constant of R12 and C2, when the U4B inputs taboo
After stop signal INHIBIT, latch pulse LATCH signals are eliminated.
Polarity detection circuit 6 includes comparator U3C, resistance R5, R6, R7, R8, R9, R10, diode D1, comparator U3C
In-phase input end through resistance R7 be grounded, reverse input end after resistance R5 and R6 parallel connection with the output end phase of integrator U0A
Even, output end is connected through resistance R9 with the anode of diode D1, and the cathode of diode D1 is grounded through resistance R10, diode D1
Cathode be signal output end.The polarity detection circuit 6 receives the b voltages of the output of integrator circuit 1, inputs LM319 hysteresis ratios
Compared with device U3C, through 1N4148 diode D1 rectifications, the TTL logic level K2 and DIR signals output is generated, such as the f waves of Fig. 3
Shape selects positive and negative constant flow source course of discharge, makes the charging electricity of integrating capacitor C1 for controlling the bidirectional constant source circuit 7
Pressure is discharged back to zero.
It includes single-pole double-throw switch (SPDT) that discharge loop control circuit 4, which uses single-pole double-throw switch (SPDT) K1, bidirectional constant source circuit 7,
K2, resistance R41 and R3, the control terminal of single-pole double-throw switch (SPDT) K1 are connected, no with the output end of the first monostable pulses shaping circuit 3
Moved end is connected with the reverse input end of integrator circuit 1, the moved end of the moved end and single-pole double-throw switch (SPDT) K1 of single-pole double-throw switch (SPDT) K2
It is connected, non-moving end is connected through resistance R3, R41 with input voltage source respectively, and control terminal and the polarity of single-pole double-throw switch (SPDT) K2 are examined
The output end of slowdown monitoring circuit 6 is connected.
Anti- fault protection circuit 8 includes comparator U2A, U2B and XOR gate U5, the in-phase input end and ratio of comparator U2A
Reverse input end compared with device U2B is connected with input voltage source respectively, and the reverse input end of comparator U2A and comparator U2B's is same
Phase input terminal is connected with the output end of integrator circuit 1, the input terminal of the output end and XOR gate U5 of comparator U2A and U2B
It is connected, the output end of XOR gate U5 is connected with the control terminal of single-pole double-throw switch (SPDT) K3 in integrator circuit.
A kind of control method for the bipolarity voltage controlled oscillator in R/D converters includes the following steps：
S1：The Ui inputs of bipolarity DC voltage, the resistance R1 being concatenated, to the integral electricity of the active integrator U0A
Hold C1 and carries out two-way charging, the output voltage opposite with Ui polarity of voltages；
S2：The bidirectional output voltage that capacitance C1 chargings obtain, window of the input by+1.1V and -1.1V as double comparison thresholds
Mouth comparator U1A or U1B, the window comparator generate the negative saltus step pulse falling edge by logical one to logical zero；
S3：The negative saltus step pulse falling edge, input integral type monostable pulses shaping circuit U4A make U4A export Q
End, which generates, counts pulse BUSY signals, and pulse width is determined by the time constant of R13 and C3, and the non-ends U4A output Q generate logic and open
OFF signal K1；
S4：Logical switching signal K1 controls positive and negative constant flow source discharge loop, the bi-directional voltage that capacitance C1 chargings are obtained into
Row electric discharge back to zero, generates the bipolarity sawtooth signal；
S5：Logical switching signal K1 inputs monostable pulses shaping circuit U4B again, and the ends U4B output Q is made to generate latch pulse
LATCH signals, pulse width are determined by the time constant of R12 and C2, after the U4B inputs disable signal INHIBIT, lock
Pulse LATCH signals are deposited to be eliminated；
S6：Bipolarity sawtooth signal inputs hysteresis loop comparator U3C, through diode D1 rectifications, generates TTL logic levels K2
And the output of DIR signals, for selecting positive and negative constant flow source course of discharge, the charging voltage of integrating capacitor C1 is made to be discharged back to zero；
S7：The bidirectional output voltage that capacitance C1 chargings obtain, window of the input by+1.6V and -1.6V as double comparison thresholds
Mouth comparator U2A or U2B generate logic high, and the logical switching signal for preventing the voltage-controlled blocking of oscillator is generated through XOR gate U5
K3；
S8：Logical switching signal K3 control discharge loops put the both ends charging voltage of integrating capacitor C1 through resistance R2
Electric back to zero, to prevent voltage controlled oscillator failure of oscillation state from occurring.
Bipolarity voltage controlled oscillator of the present invention can receive the input of bipolarity DC voltage, generate the meter of Transistor-Transistor Logic level
Rapid pulse rushes BUSY signals and latch pulse LATCH signals, while according to the polarity of input voltage, generating control plus/minus counting side
To TTL logic level DIR signals, and can receive externally input disable signal INHIBIT, forbid the generation of LATCH pulse,
And the normal output of BUSY pulses is not influenced, reach R/D converter inside analog to digital tracking the special of loop circuit and has wanted
It asks.The present invention can complete input bipolarity DC voltage, output meter in different technical parameter R/D converter inside independent designs
Rapid pulse rushes BUSY signals and latch pulse LATCH signals, and generates the functional requirement of the DIR signals of control plus/minus counting direction.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the model of the present invention
It encloses and is defined, under the premise of not departing from design spirit of the present invention, technical side of the those of ordinary skill in the art to the present invention
The various modifications and improvement that case is made should all be fallen into the protection domain of claims of the present invention determination.
Claims (8)
1. a kind of bipolarity voltage controlled oscillator in R/D converters, it is characterised in that：Including integrator circuit（1）, it is two-door
Limit comparison circuit（2）, the first monostable pulses shaping circuit（3）, discharge loop control circuit（4）, the second monostable pulses it is whole
Shape circuit（5）, polarity detection circuit（6）, bidirectional constant source circuit（7）With anti-fault protection circuit（8）；The integrator circuit
（1）Input terminal be connected with voltage source, output end respectively with anti-fault protection circuit（8）, double threshold comparison circuit（2）The pole and
Property detection circuit（6）It is connected, the anti-fault protection circuit（8）Output end and integrator circuit（1）Discharge switch control
End is connected, the double threshold comparison circuit（2）Output end through the first monostable pulses shaping circuit（3）With the second monostable arteries and veins
Rush shaping circuit（5）Input terminal be connected, the polarity detection circuit（6）Output end and bidirectional constant source circuit（7）Choosing
It selects switch control terminal to be connected, bidirectional constant source circuit（7）Output end through discharge loop control circuit（4）With integrator circuit
（1）Input terminal be connected, the first monostable pulses shaping circuit（3）Output end and discharge loop control circuit（4）'s
Input terminal is connected.
2. the bipolarity voltage controlled oscillator according to claim 1 in R/D converters, it is characterised in that：The product
Divide device circuit（1）Including integrated transporting discharging U0A, single-pole double-throw switch (SPDT) K3, resistance R2 and capacitance C1, the integrated transporting discharging U0A's is same
Phase input end grounding, reverse input end are connected through resistance R1 with external voltage source, and output end is through resistance R2 and single-pole double throw
The moved end of switch K3 is connected, and the non-moving end of single-pole double-throw switch (SPDT) K3 is connected with the reverse input end of integrated transporting discharging U0A, integrated transporting discharging
The output end of U0A and anti-fault protection circuit（8）Input terminal be connected, one end of the capacitance C1 is anti-with integrated transporting discharging U0A's
It is connected to input terminal, the other end is connected with the output end of integrated transporting discharging U0A.
3. the bipolarity voltage controlled oscillator according to claim 1 in R/D converters, it is characterised in that：It is described double
Thresholding comparison circuit（2）Noninverting input and comparator U1B including comparator U1A and comparator U1B, the comparator U1A
Reverse input end be connected respectively with input voltage source, the in-phase input end of the reverse input end and comparator U1B of comparator U1A
And integrator circuit（1）Output end be connected, the output end and the output end of comparator U1A and first of comparator U1B is monostable
State pulse shaper（3）Input terminal be connected, the output end of comparator U1A is connected through resistance R4 with power supply VCC.
4. the bipolarity voltage controlled oscillator according to claim 1 in R/D converters, it is characterised in that：Described
One monostable pulses shaping circuit（3）Using monostable flipflop U4A, the second monostable pulses shaping circuit（5）Using
The input failing edge of monostable flipflop U4B, the monostable flipflop U4A and double threshold comparison circuit（2）Output end phase
Even, input rising edge is connected with the output end of monostable flipflop U4B, the input failing edge ground connection of monostable flipflop U4B,
It inputs rising edge and is connected with the output end of monostable flipflop U4A.
5. the bipolarity voltage controlled oscillator according to claim 1 in R/D converters, it is characterised in that：The pole
Property detection circuit（6）Including comparator U3C, resistance R5, R6, R7, R8, R9, R10, diode D1, the comparator U3C's is same
Phase input terminal through resistance R7 be grounded, reverse input end after resistance R5 and R6 parallel connection with integrator circuit（1）Output end phase
Even, output end is connected through resistance R9 with the anode of diode D1, and the cathode of diode D1 is grounded through resistance R10, two pole
The cathode of pipe D1 is signal output end.
6. the bipolarity voltage controlled oscillator according to claim 1 in R/D converters, it is characterised in that：It is described to put
Electrical circuit control circuit（4）Using single-pole double-throw switch (SPDT) K1, the bidirectional constant source circuit（7）Including single-pole double-throw switch (SPDT) K2,
Resistance R41 and R3, the control terminal of the single-pole double-throw switch (SPDT) K1 and the first monostable pulses shaping circuit（3）Output end phase
Even, non-moving end and integrator circuit（1）Reverse input end be connected, the moved end of the single-pole double-throw switch (SPDT) K2 and single-pole double throw
The moved end of switch K1 is connected, and non-moving end is connected through resistance R3, R41 with input voltage source respectively, the single-pole double-throw switch (SPDT) K2
Control terminal and polarity detection circuit（6）Output end be connected.
7. the bipolarity voltage controlled oscillator according to claim 1 in R/D converters, it is characterised in that：It is described anti-
Fault protection circuit（8）Including comparator U2A, U2B and XOR gate U5, the in-phase input end and comparator of the comparator U2A
The reverse input end of U2B is connected with input voltage source respectively, and the reverse input end of comparator U2A is same mutually defeated with comparator U2B's
Enter end and integrator circuit（1）Output end be connected, the input of the output end and XOR gate U5 of the comparator U2A and U2B
End is connected, the output end and integrator circuit of XOR gate U5（1）The control terminal of middle single-pole double-throw switch (SPDT) K3 is connected.
8. a kind of control method for the bipolarity voltage controlled oscillator in R/D converters, which is characterized in that including following step
Suddenly：
（1）The Ui inputs of bipolarity DC voltage, the resistance R1 being concatenated carry out the integrating capacitor C1 of active integrator U0A double
To charging, the output voltage opposite with Ui polarity of voltages；
（2）The bidirectional output voltage that capacitance C1 chargings obtain, window ratio of the input by+1.1V and -1.1V as double comparison thresholds
Compared with device U1A and U1B, which generates the negative saltus step pulse falling edge by logical one to logical zero；
（3）The negative saltus step pulse falling edge, input integral type monostable pulses shaping circuit U4A make U4A output Q end productions
Livelihood rapid pulse rushes BUSY signals, and pulse width is determined by the time constant of R13 and C3, and U4A exports the non-ends Q and generates logic switch letter
Number K1；
（4）Logical switching signal K1 controls positive and negative constant flow source discharge loop, and the bi-directional voltage obtained to capacitance C1 chargings is put
Electric back to zero generates the bipolarity sawtooth signal；
（5）Logical switching signal K1 inputs monostable pulses shaping circuit U4B again, and the ends U4B output Q is made to generate latch pulse
LATCH signals, pulse width are determined by the time constant of R12 and C2, after U4B inputs disable signal INHIBIT, latch pulse
LATCH signals are eliminated；
（6）Bipolarity sawtooth signal inputs hysteresis loop comparator U3C, and through diode D1 rectifications, generating TTL logic levels K2 is
DIR signals export, and for selecting positive and negative constant flow source course of discharge, the charging voltage of integrating capacitor C1 are made to be discharged back to zero；
（7）The bidirectional output voltage that capacitance C1 chargings obtain, window ratio of the input by+1.6V and -1.6V as double comparison thresholds
Logic high is generated compared with device U2A and U2B, the logical switching signal K3 for preventing the voltage-controlled blocking of oscillator is generated through XOR gate U5；
（8）Logical switching signal K3 control discharge loops discharge back to the both ends charging voltage of integrating capacitor C1 through resistance R2
Zero, to prevent voltage controlled oscillator failure of oscillation state from occurring.
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| CN112615619B (en) * | 2020-12-22 | 2023-09-22 | 苏州邈航科技有限公司 | Three-threshold IF conversion circuit |
| CN114217122A (en) * | 2021-11-23 | 2022-03-22 | 黑龙江省原子能研究院 | Capacitance integral weak current measuring I/F conversion circuit |
| CN115498981A (en) * | 2022-09-01 | 2022-12-20 | 圣邦微电子（北京）股份有限公司 | Monostable circuit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101226066A (en) * | 2008-01-25 | 2008-07-23 | 连云港杰瑞电子有限公司 | Multiple-loop absolute type rotary encoder based on rotating transformer |
| CN202083398U (en) * | 2011-04-22 | 2011-12-21 | 长丰集团有限责任公司 | Signal conditioning circuit of rotating transformer |
| CN103560743A (en) * | 2013-10-23 | 2014-02-05 | 国家电网公司 | Method and device for detecting rotating speed of motor |
| CN104954022A (en) * | 2015-07-17 | 2015-09-30 | 深圳市芯联电子科技有限公司 | Digital converter of rotary transformer and integrating circuit of digital converter |
| CN205249186U (en) * | 2015-11-30 | 2016-05-18 | 中国电子科技集团公司第四十三研究所 | A bipolarity voltage controlled oscillator for in RD converter |
-
2015
- 2015-11-30 CN CN201510858037.2A patent/CN105281771B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101226066A (en) * | 2008-01-25 | 2008-07-23 | 连云港杰瑞电子有限公司 | Multiple-loop absolute type rotary encoder based on rotating transformer |
| CN202083398U (en) * | 2011-04-22 | 2011-12-21 | 长丰集团有限责任公司 | Signal conditioning circuit of rotating transformer |
| CN103560743A (en) * | 2013-10-23 | 2014-02-05 | 国家电网公司 | Method and device for detecting rotating speed of motor |
| CN104954022A (en) * | 2015-07-17 | 2015-09-30 | 深圳市芯联电子科技有限公司 | Digital converter of rotary transformer and integrating circuit of digital converter |
| CN205249186U (en) * | 2015-11-30 | 2016-05-18 | 中国电子科技集团公司第四十三研究所 | A bipolarity voltage controlled oscillator for in RD converter |
Non-Patent Citations (1)
| Title |
|---|
| 一种用于高精度跟踪型RDC的压控振荡器;徐大林 等;《固体电子学研究与进展》;20100331;第30卷(第1期);第139-145页 * |
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