CN103618547A - Amplifier with output voltage exceeding power source voltage - Google Patents
Amplifier with output voltage exceeding power source voltage Download PDFInfo
- Publication number
- CN103618547A CN103618547A CN201310616672.0A CN201310616672A CN103618547A CN 103618547 A CN103618547 A CN 103618547A CN 201310616672 A CN201310616672 A CN 201310616672A CN 103618547 A CN103618547 A CN 103618547A
- Authority
- CN
- China
- Prior art keywords
- amplifier
- circuit
- voltage
- signal
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Amplifiers (AREA)
Abstract
The invention provides an amplifier with an output voltage exceeding a power source voltage. The amplifier can be used for supplying electricity to a battery so that a high-impedance load and a moderate bandwidth signal with a low current can be driven. An amplifier circuit comprises a transconductance amplifier used for providing high output impedance and a charge pump DC/DC converter providing a high power source voltage for the transconductance amplifier. According to the amplifier, the gain of the amplifier is a function of the input voltage, so that the transfer function linearization between the input end load of the amplifier and the corresponding output end load of the amplifier is achieved.
Description
Technical field:
The present invention relates to the amplifier circuit for low-voltage equipment, as powered battery product.The output voltage range beyond supply voltage of the low voltage amplifier circuit more particularly, the present invention relates to.
Background technology:
In many fields of electronics industry, designer turns to low-work voltage.Low-voltage causes increase the useful life of battery, the weight saving of product, and can make integrated circuit become less and more intensive.This is very favourable to the design of portable electric appts.For example, most mobile portable phone is used the circuit design of 5 volts in early days.Yet current trend is that use operating voltage is the circuit of 1.0 to 3.3 volts of scopes, even may be lower in future.
Although low-work voltage is favourable to extending the useful life of battery, low-voltage may be unfavorable for the operation of circuit.For example, when the supply voltage of circuit is lowered, the signal voltage range in circuit reduces, thereby has increased the impact of noise.In addition, typical amplifier circuit can not be exported the voltage that covers all power voltage range.On the contrary, output voltage is often limited in some values, and these values are kept off several volts at zero point of power rail.The power rail that this is minimum and the voltage difference between output voltage, be called as " headroom ", and this is that circuit design function is with the minor variations of supply voltage.Therefore,, when supply voltage reduces, headroom accounts for larger ratio of available output voltage range.
In phase-locked loop (PLL) circuit, to circuit, operation has a negative impact low-work voltage.The application of phase-locked loop is very extensive, relates generally to communication aspects.For example, phase-locked loop is used for recovering the carrier frequency in wireless radio transmission, recovers the data clock in digital bit stream, and the frequency of trace signals.Phase-locked loop also can be used for frequency and the phase place of modulation and demodulation signal, to synthesize wireless radio transmission and receive frequency accurately, and other some application.
In its most basic form, a phase-locked loop comprises phase detectors and voltage-controlled oscillator (VCO).Phase detectors produce an error signal or control voltage, and this controls the output signal of voltage based on voltage controlled oscillator and the phase difference between reference frequency.Conversely, this controls the frequency that voltage determines voltage-controlled oscillator.Therefore, phase detectors provide feedback, and voltage-controlled oscillator is vibrated at reference frequency place.In addition, the details of phase-locked loop operation is below being discussed.One is more thoroughly improved and is found in phase-locked loop circuit design, and this is included into the whole references of the present invention.
To phase-locked loop circuit, operation has a negative impact low-work voltage in a different manner.First, low supply voltage reduces the usable range of the control voltage that offers voltage-controlled oscillator, thereby has limited the available frequency range of phase-locked loop circuit.This restriction is more important, because the headroom characteristic of typical phase detecting circuit, thereby further reduce available control voltage range.
Although do not caused by low-work voltage, phase-locked loop circuit shows the non-linear relation of controlling between voltage and output frequency conventionally.This makes phase-locked loop feedback circuit compensation because the change of the loop gain of voltage-controlled oscillator working point is more difficult.In general, feedback control loop compensation is determined by the voltage-controlled oscillator working point with high loop gain, makes phase-locked loop circuit pass through its working range overcompensation.This overcompensation may must high-speed switch frequency have a negative impact to phase-locked loop circuit.For example, in time division multiplexing GSM cell phone specified scheme, phase-locked loop circuit must be able to change the frequency of a time slot, approximately 570 microseconds.The phase-locked loop circuit of overcompensation can not solve new operating frequency within the required time.
Summary of the invention:
Therefore need to provide and there is circuit and the method that is less than approximately 5 volts of operating voltage amplifiers.And first-selection is less than approximately 3 volts of scopes.
It is desirable that circuit and the method for the low voltage amplifier of not sacrificing output voltage range are provided.
In addition, provide and there is circuit and the method that is less than approximately 5 volts of operating voltage phase-locked loops.And first-selection is less than approximately 3 volts of scopes.
It is desirable that circuit and the method for the low-voltage phase-locked loop of not sacrificing frequency range are provided.
In addition,, in the whole frequency range of phase-locked loop circuit, preferably can provide and there is phase-locked loop circuit and the method that approaches linear control voltage-frequency transfer function.
Technical solution of the present invention:
The object of the invention is by comprising that the integrated circuit of charge pump DC/DC transducer increases the transconductance amplifier circuit of available operating voltage and driving high impedance load.In an example of the present invention, this amplifier has correlated inputs gain, to such an extent as to transmission characteristic is a piecewise linear function that approaches nonlinear transfer function.
Contrast patent documentation: CN201839209U output voltage controller 201020271410.7
Accompanying drawing explanation:
Object of the present invention will describe in detail below, and accompanying drawing will be further described advantage of the present invention.The reference character of part of devices is indicated in the drawings.
Fig. 1 is the theory diagram of a typical phase-locked loop.
Fig. 2 is the rough schematic view of voltage-controlled oscillator in Fig. 1.
Fig. 3 is the control voltage of voltage-controlled oscillator in Fig. 2 and the chart of frequency.
Fig. 4 A is the detailed schematic diagram of Fig. 1 phase detectors and filter, and Fig. 4 B is the sequential chart of Fig. 4 A circuit operation.
Fig. 5 is the clearance diagram of typical phase detectors.
Fig. 6 is the schematic diagram of a typical phase-locked loop.
Fig. 7 controls the simplification schematic diagram of oscillator typical case amplifier circuit for driving voltage in Fig. 6.
Fig. 8 is the simplification schematic diagram of switched capacitance charge pump in Fig. 7.
Embodiment:
In order to help to disclose a preferred embodiments of the present invention, phase-locked loop circuit is described below, more particularly, driving voltage is controlled the amplifier of the variable capacitance diode in oscillator.Yet the present invention is not limited to such application, for any low voltage circuit, drive high impedance load more at large, the voltage of this load has surpassed power rail.For example, open the power switch of bridge and N-channel MOS field effect transistor completely, improve its grid voltage, with higher than several volts of source voltage.The designed amplifier of principle according to the present invention can fully improve the output voltage of metal-oxide-semiconductor field effect transistor.Variable capacitance diode during a similar amplifier can encircle mutually for biases lock.
In Fig. 1, phase-locked loop (PLL) circuit 10 comprises voltage-controlled oscillator 12, and the frequency of its output signal is determined by the control voltage of input.The output signal frequency of voltage-controlled oscillator 12 matches with the frequency input signal of feedback path by phase detectors 14 and loop filter 16.Phase detectors 14 provide a phase error signal, and this phase error signal is balanced with the phase difference between reference frequency and voltage-controlled oscillator output signal.Loop filter 16 filters out phase error signal and produces the control voltage that service voltage is controlled oscillator 12.The response time that loop filter 16 also can be used for controlling the bandwidth of phase-locked loop and optimizes phase-locked loop.
As an illustrative example of phase-locked loop 10 operations, consider the situation of a voltage-controlled oscillator phase of output signal hysteresis reference frequency.In this case, phase detectors 14 produce one and tend to increase the error signal of controlling voltage.The control voltage increasing makes the frequency of voltage-controlled oscillator rise to one a little more than the frequency of reference frequency.Unmatched frequency reduces phase error gradually, finally makes the input signal guiding reference signal of voltage-controlled oscillator.Then, phase detectors 14 drive lower control voltage, thereby have reduced the frequency of voltage-controlled oscillator, and have reduced the phase error between reference frequency and voltage-controlled oscillator output signal.Response time and excessive frequency correction can be by selecting the characteristic of suitable loop filter 16 to adjust.The feedback of phase detectors makes voltage-controlled oscillator approach very much the vibration of frequency input signal place.
Additional element can be added in a basic phase-locked loop, and improving the various characteristics of phase-locked loop or making output frequency is the multiple of input reference frequency.For example, phase-locked loop 10 comprises frequency divider 18, to such an extent as to the output frequency of voltage-controlled oscillator is the multiple of reference frequency.To the filtration of adjunct circuit, detect, multiply each other and can revise phase-locked loop behavior in some applications to the processing of input, output or feedback signal.
Due to stiff stability, antinoise and the high operate frequency of resonant circuit, resonant circuit is conventionally based on voltage-controlled oscillator.The electric capacity of variable capacitance diode changes with the form of electronics.Particularly, the junction capacitance of variable capacitance diode is a back-biased function.Therefore, variable capacitance diode is generally used for controlling the output frequency of the resonant oscillator based on voltage-controlled oscillator.
Fig. 2 has shown the variable capacitance diode based on voltage-controlled oscillator.Voltage-controlled oscillator 12 comprises a resonance lc circuit, is also referred to as LC groove, by inductance 20, electric capacity 30, electric capacity 22 and variable capacitance diode 24, is formed.The output of output amplifier 26 buffering LC grooves, prevents the loading of circuit below.Feedback amplifier 28 and electric capacity 30 provide the feedback path of a driving and lasting resonance LC oscillating circuit.According to formula ' C ', be the equivalent combinations of electric capacity 30, electric capacity 22 and variable capacitance diode 24 capacitances, the resonance frequency of voltage-controlled oscillator is the functional value of inductance 20, electric capacity 30, electric capacity 22 and variable capacitance diode 24.
As mentioned above, the electric capacity of variable capacitance diode is applied to back biased on variable capacitance diode and difference by change.Because the biasing on variable capacitance diode 24 determines by controlling voltage, so control voltage, determine the capacitance of variable capacitance diode 24 and the resonance frequency of LC groove.Resistance 32 and 34 and electric capacity 36 form a low pass filter, level and smooth and isolate the oscillator signal that exchanges of variable capacitance diode 24 to be used in the voltage of biasing variable capacitance diode 24.
Except the non-linear nature of a typical voltage-controlled oscillator transfer function is described, Fig. 3 shows the impact that reduces the control voltage range in voltage-controlled oscillator frequency range.For example, if control the scope of voltage, be from approximately 0.4 volt to 4.6 volts (output voltage ranges of typical 5 volts of phase detectors), then frequency range is from approximately 620 megahertz to 740 megahertzes.Yet if control the scope (output voltage ranges of typical 2.7 volts of phase detectors) that voltage is limited in approximately 0.4 volt to 2.3 volts, then voltage-controlled oscillator frequency range reduces to 700 megahertzes from approximately 620 megahertzes.
The voltage difference of for example controlling, for example, between voltage range (0.4-4.6 volt) and circuit voltage (0-5 volt) is called as headroom, and this headroom is a characteristic of phase detectors output circuit.Fig. 4 A is the output circuit of typical phase detectors 14.Output stage comprises current source 42a and 42b, their opening and closing phase comparators 44, the phase relation between the input end signal of phase comparator 44 based on corresponding.For example, rising edge from the rising edge of reference signal to feedback signal, current source 42a may be opened and current source 42b may be closed, and the rising edge of feedback signal arrives the rising edge of reference signal, and current source 42a may be closed and current source 42b may be opened.This sequential chart by Fig. 4 B illustrates.
The headroom of phase detectors and the impact of low-work voltage are limited in voltage-controlled oscillator frequency range.According to principle of the present invention, these restrictions may be exaggerated device (for example variable capacitance diode driver) and overcome, and the scope of this amplifier output voltage is higher than supply voltage, and supply voltage is between loop filter and voltage-controlled oscillator input, as shown in Figure 6.According to principle of the present invention, variable capacitance diode driver 50 makes its input control the variable capacitance diode in oscillator 12 for controlling voltage and providing an amplification output to bring in bias voltage.
Referring now to Fig. 7, typical variable capacitance diode drive circuit 50 comprises charge pump DC/DC transducer 52 and amplifier 54.Charge pump DC/DC transducer 52 is heterogeneous switching capacities, and voltage multiplier has an effective switching frequency that is about 4 megahertzes.Charge pump DC/DC transducer 52 is about double V in its one of CP output generation
cCvoltage, for amplifier 54 provides power supply.
Fig. 8 is the rough schematic view of a typical switched capacitance charge pump voltage multiplier, and wherein charge pump 52 comprises striding capacitance 85, storage capacitance 56 and switch 81-84.Switch 81-84 is at two stage runnings, and these two stages control 87 by switching sequence makes supply voltage (V
cC) transfer in storage capacitance 56.
In the first stage, switch 81-82 is closed, and switch 83-84 disconnects, to such an extent as to striding capacitance 85 is coupled to supply voltage (V
cC) locate.In second stage, switch 81-82 disconnects, and switch 83-84 is closed, and the electric charge on striding capacitance 85 is transferred in storage capacitance 56.In second stage, switch 81-84 configuration circuit, to such an extent as to voltage on striding capacitance 85 is added on supply voltage, therefore, the voltage in storage capacitance 56 is the twice of supply voltage.
In first example of the present invention, only have amplifier 54(Fig. 7) output-stage circuit be applied to DC/DC transducer 52.Yet in first-selected example, another circuit of amplifier 54, as input stage circuit is applied to DC/DC transducer 52, makes the output beyond supply voltage of amplifier 54.Therefore, amplifier 54 can be classified as the input amplifier of " rail-to-rail ".
According to principle of the present invention, charge pump 52 with the same integrated antenna package of amplifier 54 in, storage capacitance 56 is outer members of unique charge pump 52.In another example, phase detectors 14(Fig. 6) and varactor diode circuit 50 be combined in same integrating device.
Various DC/DC transducers, for example voltage frequency tripler, operates in different frequency of operation, can be used for providing energy to amplifier 54.Yet, according to principle of the present invention, being greater than under the frequency of 4 megahertzes, in integrated circuit, use internal switch capacitor.In addition, the high output impedance of trsanscondutance amplifier 54, together with output filter electric capacity 22, provides source of high frequency current ripple control.The value of output filter electric capacity 22 is adjusted to the variable capacitance diode drive circuit of three dB bandwidth.
The control voltage that amplifier 54 is changed input is electric current, gives capacitor 22 charging and dischargings.Amplifier 54 comprises a trsanscondutance amplifier, and this trsanscondutance amplifier has the closed-loop valtage gain that a value by resistance 58 and 60 is set. Resistance 58 and 60 value provide a gain that is about 1.7-2.5, to such an extent as to the input of 2-3 volt will be charged to the reverse bias voltage of 5 volts to variable capacitance diode.In some applications, amplifier 50 also comprises voltage source 68, and by input voltage offset, to such an extent as to when input signal is limited in higher than the lower value of 0 volt, the output of 0 volt is provided, for example, and the headroom of phase detectors output stage.Capacitor 69 and 70 provides frequency compensation and reduces by high feedback resistance 58 and 60 thermal noises that produce.
Get back to Fig. 2, the output of amplifier 54 is by an application of low pass filters in variable capacitance diode 24, and this low pass filter comprises resistance 32 and 34, electric capacity 36.Other device that is coupled to variable capacitance diode 24 comprises electric capacity 22 and 30.For example, because these devices are open (bias voltages of variable capacitance diode) to direct current signal substantially, 54 needs of amplifier provide enough electric currents to come, to the variable capacitance diode 24 capacitor charging relevant with other, to reach required reverse bias voltage.Therefore, the electric current on trsanscondutance amplifier 54 is very low, and can be met by charge pump DC/DC transducer 52.Although higher electric current is for first preferred embodiments of the present invention, trsanscondutance amplifier 54 obtains the electric current lower than about 100-200 microampere, to such an extent as to charge pump DC/DC transducer 52 can be used internal switch electric capacity.
As what discuss before herein, the output frequency of voltage-controlled oscillator is generally one and controls non-linear to voltage function.This is non-linear makes the design of the loop filter optimized more difficult, as the design of complicated phase-locked loop.According to the present invention, variable capacitance diode 50 has a nonlinear transfer function, makes the frequency of voltage-controlled oscillator approach the linear function that phase discriminator output is controlled voltage.This is to realize by changing the gain of amplifier 54, according to controlling voltage, in a piecewise linearity mode, will control the linearisation of voltage/frequency transfer function, as shown in loop filter.
With reference to figure 7, resistance 62 and the diode 63 of series connection are coupled in parallel on resistance 60.Low control voltage diode 63 is non-conductive, and the gain of the closed loop of amplifier 54 is determined by resistance 58 and 60.Yet, when controlling voltage, surpassing forward voltage drop diode 63, diode starts the closed loop gain of resistance 62 is in parallel with resistance 60 and raising amplifier 54 effectively.Therefore,, in the transfer function of amplifier 54, resistance 62 and diode 63 provide a lifting or interruption.Extra resistance and the diode in parallel with resistance 60 provide extra interruption.For example, voltage equals 2 diode drops provides an interruption, and this diode drop is provided by resistance 64, diode 65,66 parallel connections of resistance 60 and series connection.By selecting suitable lifting quantity and position, a piecewise linearity transfer function can obtain the nonlinear Control double-voltage control oscillator frequency transfer function of correcting.
The present invention can describe and carry out according to it, and for the purpose of illustrating, object of the present invention is unrestricted, and right of the present invention is subject to the restriction of right interpellation book.
Claims (9)
1. the amplifier of an output voltage range beyond supply voltage, it is characterized in that: amplifier has one for receiving the power input of supply voltage and one for receiving the signal input part of input signal, this amplifier comprises DC/DC converter circuit, this circuit comprises a switched capacitance charge pump that is coupled to power input, and DC/DC converter circuit provides one higher than the voltage of supply voltage; Amplifier circuit is included in the output stage being coupled between DC/DC converter circuit and signal output part, to such an extent as to the voltage of signal output part has surpassed the voltage of power input.
2. the amplifier of a kind of output voltage range beyond supply voltage according to claim 1, is characterized in that: switched capacitance charge pump comprises a voltage multiplier; DC/DC converter circuit and amplifier circuit comprise an integrated circuit; Switched capacitance charge pump comprises integrated charge transfer capacitance device; Amplifier circuit has the range of signal that predetermined gain carrys out matched signal input, and signal input part has the output signal of predetermined voltage range; The gain of amplifier circuit is the predefined function of input signal, and this function is the piece wire approximation value of nonlinear function; Wherein nonlinear function is similar to the inverse transfer function of circuit signal output; This amplifier circuit also comprises transconductance amplifier circuit.
3. the amplifier of a kind of output voltage range beyond supply voltage according to claim 2, is characterized in that: amplifier circuit further comprises: the first resistance being coupled between the output of transconductance amplifier circuit and input; Be coupled to the second resistance of the input of transconductance amplifier circuit, the resistance of the first and second resistance determines the gain of transconductance amplifier circuit; Be coupled to the 3rd resistance of transconductance amplifier circuit input; With the switch of the 3rd resistance series coupled, this switch is optionally in parallel with the second resistance by the 3rd resistance, carrys out the voltage of response amplifier input, to change the gain of amplifier, thereby carrys out the voltage of response amplifier input.
4. the amplifier of a kind of output voltage range beyond supply voltage according to claim 1, it is characterized in that: variable capacitance diode drive circuit has one for receiving the power input of supply voltage and one for receiving the signal input part of input signal, this amplifier comprises DC/DC converter circuit, this circuit comprises a switched capacitance charge pump that is coupled to power input, and DC/DC converter circuit provides one higher than the voltage of power input terminal voltage; Amplifier circuit is coupled to signal input part, and the output stage of amplifier circuit is coupled between DC/DC converter circuit and signal output part, DC/DC transducer provides energy to this output stage, to cause the voltage of signal output part to surpass the voltage of power input.
5. the amplifier of a kind of output voltage range beyond supply voltage according to claim 4, is characterized in that: the switched capacitance charge pump circuit in variable capacitance diode drive circuit comprises a voltage multiplier; DC/DC converter circuit in variable capacitance diode drive circuit and amplifier circuit comprise an integrated circuit; Switched capacitance charge pump in variable capacitance diode drive circuit comprises integrated charge transfer capacitance device; Amplifier circuit in variable capacitance diode drive circuit has the range of signal that predetermined gain carrys out matched signal input, and signal input part has the output signal of predetermined voltage range; The gain of the amplifier circuit in variable capacitance diode drive circuit is input signal function; This function is the piece wire approximation value of nonlinear function; Nonlinear function in variable capacitance diode drive circuit is similar to the inverse transfer function of circuit signal output.
6. the amplifier of a kind of output voltage range beyond supply voltage according to claim 1, is characterized in that: the method for amplifying signal comprises and is provided for receiving the charge pump circuit of supply voltage and providing one higher than the voltage of supply voltage; Be provided for receiving the amplifier circuit of signal, wherein this amplifier circuit is included in the output stage being coupled between charge pump circuit and amplifier circuit output, to such an extent as to the voltage range beyond supply voltage of amplifying signal; Provide the step of charge pump circuit to comprise a switched capacitance charge pump voltage multiplier is provided; Provide the step of charge pump circuit and amplifier circuit to comprise an integrated circuit; Provide the step of amplifier circuit to comprise that amplifier circuit has the voltage range that required output signal is mated in predetermined gain; Provide the step of amplifier circuit to comprise that the gain of amplifier circuit is prearranged signal function, and this function is the piece wire approximation value of nonlinear function; Wherein nonlinear function is similar to the inverse transfer function of circuit signal output.
7. the amplifier of a kind of output voltage range beyond supply voltage according to claim 1, is characterized in that: drive circuit comprises an amplifier; Be used for the DC/DC electric pressure converter that receives input voltage and supply voltage is provided to amplifier; The first resistance being coupled between amplifier out and input, sets up a feedback loop; Be coupled to the second resistance of amplifier in, the resistance of the first and second resistance determines the gain of amplifier; Be coupled to the 3rd resistance of amplifier in; With the first switch of the 3rd resistance series coupled, this switch is optionally in parallel with the second resistance by the 3rd resistance, carrys out the voltage of response amplifier input, thereby changes the gain of amplifier; Wherein amplifier is a trsanscondutance amplifier; Wherein switch is a diode; Wherein the switching point of the value of the second resistance and the first switch is scheduled to, to such an extent as to the gain of amplifier is similar to nonlinear function; Wherein drive circuit comprises an integrated circuit; Drive circuit further comprises the 4th resistance that is coupled to amplifier in; With the second switch of the 4th resistance series coupled, this switch is optionally in parallel with the second and the 3rd resistance by the 4th resistance, carrys out the voltage of response amplifier input; Wherein electric pressure converter is a switching capacity voltage multiplier; Wherein electric pressure converter and amplifier comprise an integrated circuit.
8. the amplifier of a kind of output voltage range beyond supply voltage according to claim 1, is characterized in that: drive the circuit of high impedance load to comprise that one for receiving the power input of the first voltage power; One for receiving the signal input part of input signal; One for providing the signal output part of output signal; Amplifier circuit comprises an output stage that is coupled to signal output part, and wherein amplifier circuit has a transfer function, and this transfer function is a piecewise linear function, is similar to the nonlinear function of input signal; Be coupled to the DC/DC voltage translator circuit of power input and output stage, for the second voltage higher than the first voltage is provided, to such an extent as to the voltage of signal output part surpasses the first voltage; DC/DC voltage translator circuit and amplifier circuit comprise an integrated circuit; DC/DC electric pressure converter comprises a switched capacitance charge pump, and integrated circuit comprises an integrated charge transfer capacitor; Wherein nonlinear function is similar to the inverse transfer function of circuit signal output; Amplifier circuit comprises transconductance amplifier circuit.
9. the amplifier of a kind of output voltage range beyond supply voltage according to claim 1, is characterized in that: integrated circuit comprises that one for receiving the power input of the first voltage power; One for receiving the signal input part of input signal; One for providing the signal output part of output signal; Amplifier circuit comprises an output stage that is coupled to signal output part, for an output signal is provided; Switched capacitance charge pump comprises integrated charge transfer capacitor, is coupled to the switched capacitance charge pump circuit of power input and output stage, is used to provide the second voltage higher than the first voltage, to such an extent as to the voltage of signal output part surpasses the first voltage; Nonlinear function is similar to the inverse transfer function of circuit signal output; Amplifier circuit comprises transconductance amplifier circuit; Amplifier circuit in variable capacitance diode drive circuit has predetermined gain, and this gain is the piece wire approximation value of a nonlinear function; In variable capacitance diode drive circuit, nonlinear function is similar to the inverse transfer function of circuit signal output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310616672.0A CN103618547A (en) | 2013-11-27 | 2013-11-27 | Amplifier with output voltage exceeding power source voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310616672.0A CN103618547A (en) | 2013-11-27 | 2013-11-27 | Amplifier with output voltage exceeding power source voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103618547A true CN103618547A (en) | 2014-03-05 |
Family
ID=50169251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310616672.0A Pending CN103618547A (en) | 2013-11-27 | 2013-11-27 | Amplifier with output voltage exceeding power source voltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103618547A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108024190A (en) * | 2016-11-03 | 2018-05-11 | 大北欧听力公司 | Include the hearing device of switching capacity dc-dc |
| US10461706B1 (en) | 2018-04-30 | 2019-10-29 | Texas Instruments Incorporated | Differential amplifier including cancellation capacitors |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6011440A (en) * | 1997-03-18 | 2000-01-04 | Linear Technology Corporation | Amplifier having output range that exceeds supply voltage |
| CN203813764U (en) * | 2013-11-27 | 2014-09-03 | 苏州贝克微电子有限公司 | Amplifier with output voltage range exceeding power supply voltage |
-
2013
- 2013-11-27 CN CN201310616672.0A patent/CN103618547A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6011440A (en) * | 1997-03-18 | 2000-01-04 | Linear Technology Corporation | Amplifier having output range that exceeds supply voltage |
| CN203813764U (en) * | 2013-11-27 | 2014-09-03 | 苏州贝克微电子有限公司 | Amplifier with output voltage range exceeding power supply voltage |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108024190A (en) * | 2016-11-03 | 2018-05-11 | 大北欧听力公司 | Include the hearing device of switching capacity dc-dc |
| US10461706B1 (en) | 2018-04-30 | 2019-10-29 | Texas Instruments Incorporated | Differential amplifier including cancellation capacitors |
| WO2019213084A1 (en) * | 2018-04-30 | 2019-11-07 | Texas Instruments Incorporated | Differential amplifier including cancellation capacitors |
| US10560064B2 (en) | 2018-04-30 | 2020-02-11 | Texas Instruments Incorporated | Differential amplifier including cancellation capacitors |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101797068B1 (en) | Average current mode control of multi-phase switching power converters | |
| US6011440A (en) | Amplifier having output range that exceeds supply voltage | |
| CN101689806B (en) | Power supplies for RF power amplifier | |
| CN103988406B (en) | Radio frequency (RF) dc-dc converter and the RF amplifying device using RF dc-dc converter | |
| US7248120B2 (en) | Stacked transistor method and apparatus | |
| CN103650337B (en) | Apparatus and method for current offset power amplifier | |
| US8787850B2 (en) | Compensating for non-linear capacitance effects in a power amplifier | |
| US7639080B2 (en) | Radio frequency amplifier circuit and mobile communication terminal using the same | |
| CN101997495B (en) | Adaptive bias circuit for adaptively biasing communication system | |
| US6853257B2 (en) | PLL circuit including a voltage controlled oscillator and a method for controlling a voltage controlled oscillator | |
| CN101405941B (en) | Voltage controlled oscillation circuit | |
| CN101164227B (en) | A power supply system. | |
| CN105322894A (en) | Envelope tracking with low frequency loss correction | |
| CN106468932A (en) | Apparatus and method for the programmable low drop-out regulator of radio frequency electronics | |
| CN103312272B (en) | Multi-mode doherty power amplifier | |
| CN104168008A (en) | RF buffer circuit with dynamic biasing | |
| CN105052036A (en) | Improved resonance suppression for envelope tracking modulator | |
| WO2010148257A1 (en) | Configurable wide tuning range oscillator core | |
| KR101300324B1 (en) | Power amplfier | |
| CN109660253B (en) | Digital amplitude controlled voltage controlled oscillator | |
| US8305155B2 (en) | Phase locked loop circuit with variable voltage sources | |
| US7847646B2 (en) | Carrier generator with LC network | |
| CN103618547A (en) | Amplifier with output voltage exceeding power source voltage | |
| CN203813764U (en) | Amplifier with output voltage range exceeding power supply voltage | |
| CN209120059U (en) | Switch power source transformation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140305 |
|
| WD01 | Invention patent application deemed withdrawn after publication |