CN108028628A - Programmable gain amplifier with controlled gain rank - Google Patents
Programmable gain amplifier with controlled gain rank Download PDFInfo
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- CN108028628A CN108028628A CN201580081987.7A CN201580081987A CN108028628A CN 108028628 A CN108028628 A CN 108028628A CN 201580081987 A CN201580081987 A CN 201580081987A CN 108028628 A CN108028628 A CN 108028628A
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- 238000012986 modification Methods 0.000 claims abstract description 5
- 230000004048 modification Effects 0.000 claims abstract description 5
- 239000003990 capacitor Substances 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 34
- 230000005611 electricity Effects 0.000 claims description 9
- 230000003190 augmentative effect Effects 0.000 claims 1
- 238000012512 characterization method Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 6
- 239000004065 semiconductor Substances 0.000 description 5
- 230000007850 degeneration Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910044991 metal oxide Inorganic materials 0.000 description 3
- 150000004706 metal oxides Chemical class 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000006163 transport media Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
- H03G3/001—Digital control of analog signals
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
- H03F1/3211—Modifications of amplifiers to reduce non-linear distortion in differential amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/45—Differential amplifiers
- H03F3/45071—Differential amplifiers with semiconductor devices only
- H03F3/45076—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier
- H03F3/45179—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using MOSFET transistors as the active amplifying circuit
- H03F3/45197—Pl types
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G1/00—Details of arrangements for controlling amplification
- H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
- H03G1/0017—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal the device being at least one of the amplifying solid state elements of the amplifier
- H03G1/0029—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal the device being at least one of the amplifying solid state elements of the amplifier using FETs
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G1/00—Details of arrangements for controlling amplification
- H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
- H03G1/0088—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using discontinuously variable devices, e.g. switch-operated
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/456—A scaled replica of a transistor being present in an amplifier
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
- H03F2203/45—Indexing scheme relating to differential amplifiers
- H03F2203/45396—Indexing scheme relating to differential amplifiers the AAC comprising one or more switches
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
- H03F2203/45—Indexing scheme relating to differential amplifiers
- H03F2203/45594—Indexing scheme relating to differential amplifiers the IC comprising one or more resistors, which are not biasing resistor
Abstract
A kind of programmable gain amplifier is provided, it includes the controlled gain rank of instant dynamic control output voltage.Programmable gain amplifier includes the first transistor and second transistor, it includes corresponding control interface, input interface and output interface.Programmable gain amplifier also includes the resistor being connected with the output interface of such transistor.Furthermore an at least third transistor and the capacitor in parallel and be connected to such output interface.Once applying control voltage to the third transistor and applying input voltage to first control interface, second control interface selectivity meets with, by the control voltage modifications, being intended to export to produce at first input interface and second input interface.
Description
Technical field
This exposure is on the programmable gain amplifier with controlled gain rank.
Background technology
In electronic circuit, programmable gain amplifier is a kind of electron-amplifier, it, which is exported, has on signal and can pass through
External digital (digital) signal or external analog (analog) signal are come the gain that controls.The reality of programmable gain amplifier
Existing gain can be different from because of process variation, voltage variation and/or temperature variations fixs one's mind on gain.Therefore, design one kind is a large amount of
The programmable gain amplifier that operation is such as fixed one's mind under operating condition can be difficult.
Due to it is various variation to control programmable gain amplifier gains (multiple) external devices it is non-belong to it is known that thus
It must attempt to impose gain control under conditions of the variation that programmable gain amplifier is subjected to is not known.Therefore, usually
The ultra-specification design programmable gain amplifier in order to compensate for various variations, the more to consider the situation of variation as far as possible
Under, act in a satisfactory manner.This ultra-specification design may include the gain ranging of finer gain rank and bigger.Again
Person, such ultra-specification design programmable gain amplifier can cause bigger component and/or more multicompartment, so that because ultra-specification designs
And footprints bigger (such as device bigger) and power consumption is accordingly increased.
The content of the invention
One aspect is on a kind of programmable gain amplifier, it is included comprising the first control interface, the first input interface
With the first transistor of the first output interface.The programmable gain amplifier is also included comprising the second control interface, the second input
The second transistor of interface and the second output interface.In addition, further including resistor, it includes be connected to first output interface
First end and the second end for being connected to second output interface.Furthermore the programmable gain amplifier is included with the resistor simultaneously
Join and be connected to first output interface and an at least third transistor for second output interface.Once apply control voltage extremely
The third transistor and application input voltage are to first control interface, and second control interface is selectively by by control electricity
Pressure modification, is intended to export to produce at first input interface and second input interface.
Another aspect is on a kind of integrated circuit, it includes being used for using the received input signal of amplifier input as base
Plinth produces the amplifier of output signal in amplifier output.The amplifier includes connecing comprising the first control interface, the first input
Mouthful with the first transistor of the first output interface and including the second control interface, the second input interface and the second output interface
Second transistor.First control interface is inputted with second control interface comprising the amplifier, and first input connects
Mouth includes the amplifier with second input interface and exports.The amplifier also include be connected to first output interface with this second
The first switch of output interface.Apply to the control voltage of the first switch and selectively control the output of the amplifier.The control
Voltage is by being supplied including imitating the feedback circuit of part amplifier, which assembles the adjustment ratio for the amplifier
Version (scaled version).The feedback circuit also includes combining the difference amplifier for judging a value, which represents
Difference between the output voltage and predetermined output voltage of the imitative part amplifier.The output of the difference amplifier includes control electricity
Pressure.
Another aspect is on a kind of method that input signal is processed into output signal.This method is included across two crystal
Pipe receives input voltage, wherein, the corresponding input interface of two transistors is connected to supply electricity through respective load resistor
Pressure.This method also includes at least one switch that voltage supply will be controlled extremely to be connected with the output interface of two transistors, its
In, which supplied by feedback circuit.Furthermore this method is included based on the input signal and the control voltage,
Guiding electric current flows through the respective load resistor, to form the output signal at the input interface of two transistors.
Brief description of the drawings
Fig. 1 illustrates the block diagram of programmable gain amplifier；
Fig. 2 illustrates the signal characterization of a circuit, which includes backfeed loop, it controls programmable-gain through rank is incremented by
The gain of amplifier；
Fig. 3 illustrates the signal characterization of programmable gain amplifier；
Fig. 4 illustrates the signal characterization of a specific embodiment of programmable gain amplifier；
Fig. 5 illustrates the example methodology for amplifying input signal；
Fig. 6 illustrates the example methodology for amplifying input signal；
Fig. 7 illustrates the example methodology being controlled for the gain rank to programmable gain amplifier；
Fig. 8 illustrates another example methodology being controlled for the gain rank to programmable gain amplifier；And
Fig. 9 illustrates the method that input signal is processed into output signal.
Embodiment
The effect of being designed for boost amplifier, revealed aspect provide the amplifier with multiple gain ranks.This is put
Big gain of the device at these step each can be controlled by backfeed loop (feedback loop), it can dynamically set this
The degeneration resistance of amplifier.
The programmable gain amplifier as disclosed herein, has built-in feedback circuit, it fixs one's mind on gain reaching
Before, constantly measure and finely tune the circuit.This measurement and fine setting are by instant or close to reaching in a manner of instant.Furthermore survey
Amount with fine setting is carried out in inside, so that being able to consider the actual variation that the circuit is subjected to.Therefore, revealed aspect reduces
Ultra-specification designs the demand of the programmable gain amplifier.Revealed aspect is also through making programmable gain amplifier 100
Size reduces with complexity to save electric power and area.
Fig. 1 illustrates the block diagram of programmable gain amplifier 100.Programmable gain amplifier 100 as disclosed herein,
Amplify right amount for signal will be received to combine, so that the succeeding state of circuit sees the same-amplitude of the signal, with this
Process variation, voltage variation, temperature variations and/or the other variations that programmable gain amplifier is subjected to are unrelated.
Discrete component can be used to implement in programmable gain amplifier 100., can be real in integrated circuits in some aspects
Apply programmable gain amplifier 100., can be in the combination institute shape according to single manufacturing technology or manufacturing technology in further aspect
Into integrated circuit and discrete component any combinations in implement programmable gain amplifier 100.
Programmable gain amplifier 100 amplifies the input signal that across amplifier input 102 is received, to be exported in amplifier
Output signal is produced at 104.Amplifier input 102 includes Vin+ interfaces 106 and Vin- interfaces 108.Amplifier output 104 includes
Vout+ interfaces 110 and Vout- interfaces 112.
Programmable gain amplifier 100 includes the first transistor 114 and second transistor 116.The first transistor 114 wraps
Containing input interface 118, output interface 120 and control interface 122.Second transistor 116 includes input interface 124, output interface
126 and control interface 128.
Input interface 118 and 124 is connected to supply voltage VDD through respective load resistor 130 and 132.Output interface
120 and 126 are connected to control voltage Vctrl.Controlling voltage Vctrl is produced by the circuit including programmable gain amplifier
Raw, which imitates part for the adjustment ratio of programmable gain amplifier 100.Produce control voltage Vctrl's
Circuit also includes difference amplifier, it is combined for judging that the adjustment ratio imitates the output voltage of part programmable gain amplifier
With the difference between be intended to output voltage.The value representative of the difference is fed back into the adjustment ratio and imitates part programmable gain amplifier
(such as through feedback circuit or backfeed loop to feed back), and the input of part programmable gain amplifier is imitated the adjustment ratio
Voltage carries out being incremented by adjustment.
For example, if the value of the difference, which represents, points out that the output of the imitative part programmable gain amplifier is too low, extremely
The input voltage that this can be imitated part programmable gain amplifier by few an iteration increases unit (expansion unit).
By way of further example, if the value of the difference, which represents, points out that the output of the imitative part programmable gain amplifier is too high, change at least once
The input voltage that this can be imitated part programmable gain amplifier by generation reduces unit (reduction unit).The increase list
Position with the reduction unit can be input voltage value it is corresponding increase and/or reduce, wherein the input voltage be should imitate part can
Program gain amplifier and suitably adjust ratio.Furthermore the increase unit and the reduction unit can be similar unit (such as
Voltage)；However, according to some implementation aspects, which is not commensurate with the reduction unit.
Incremental adjustment is to carry out iteration several times in all levels or all steps, be may be programmed until judging that the adjustment ratio imitates part
Untill the output of gain amplifier and ideal value are about the same.There is provided below in reference to Fig. 2 and (such as fed back to this feedback circuit
Road) related further information (information).
Impedor 134 is connected between output interface 120 and 126.According to an implementation aspect, impedor 134 can be with
It is resistor；However, revealed aspect can utilize other types of impedor.Furthermore third transistor 136 and impedance element
Part 134 is in parallel and is connected between output interface 120 and 126.According to some implementation aspects, can in output interface 120 and 126 with
Further transistor (such as the 4th transistor, the 5th transistor etc.) is connected between ground connection.The third transistor and follow-up crystalline substance
Body pipe is combined for providing multiple gain ranks, so as to selective control output voltage.It is explained below and is returned with internal feedback
The related further information in road.
In some aspects, impedor 134 is not connected between the two output interfaces 120 and 126.For example, source
Pole, which is degenerated, can be used switch to reach, such as metal-oxide semiconductor (MOS) (metal-oxide-semiconductor；MOS) open
Close.The source-electrode degradation is the gain of intentional step-down amplifier, is intended to make the amplifier more to be controlled and more linear.
During the operation of programmable gain amplifier 100, electric current flows through the according to the voltage level at amplifier input 102
One transistor 114 and second transistor 116.Furthermore electric current flows through loading resistor 130 and 132, and is exported in amplifier
Output signal is produced at 104.
Although it is noted that may by the programmable gain amplifier explanation of every aspect disclosed herein and
It is depicted as implementing with the field-effect transistor in integrated circuit, revealed aspect is still not only restricted to this implementation aspect.
The programmable gain amplifier can use the transistors of other classes instead to implement.For example, it is noted that, it is illustrative specific real
Applying example may explain with reference to the transistor for belonging to complementary metal oxide semiconductor (CMOS) field-effect transistor (FET),
Revealed aspect is not limited to this implementation aspect.Such transistor can be changed to any kind of transistor or semiconductor skill
Art.
According to a kind of illustrative implementation aspect, the first transistor 114 and second transistor 116 can be FET.After this reality
Make aspect, input interface 118 and 124 may correspond to the respective drain of FET, output interface 120 and 126 phases that may correspond to FET
Answer grid, and control interface 122 and the 128 corresponding source electrodes that may correspond to FET.
According to another illustrative implementation aspect, the first transistor 114 can be bipolarity junction crystalline substance with second transistor 116
Body pipe (bipolar junction transistor；BJT).After this implementation aspect, input interface 118 may correspond to 124
The corresponding collector of BJT, output interface 120 and the 126 corresponding base stages that may correspond to BJT, and control interface 122 can be right with 128
Should be in the corresponding emitter-base bandgap grading of BJT.
Furthermore the programmable gain amplifier can be used for various circuits.According to some implementation aspects, two or more can be connected
A programmable gain amplifier is to form the amplifier with higher overall gain.
According to an implementation aspect, revealed aspect can be may be programmed as this in the receiver end of data transmission channel
Certain part of gain amplifier uses.The purpose of programmable gain amplifier is that will transmit through the transmission leads in this implementation aspect
The signal amplification right amount that road enters, so that amplitude when no matter signal arrives at receiver has much, the following stages of receiver
See that the amplitude of the signal all can be the same.
According to other implementation aspects, revealed aspect can use in any universal amplifier, and wherein gain can be by anti-
It is fed back to road accurately to control, as described herein.Universal amplifier can be the component to grow on trees of analog circuitry system, because
This, as described herein, can utilize two or more programmable gain amplifiers in the circuit comprising universal amplifier.
Fig. 2 illustrates the signal characterization 200 of a circuit, which includes backfeed loop, it is programmable through rank control is incremented by
The gain of gain amplifier.The gain of control programmable gain amplifier may include degeneration resistance being set as predetermined value.However,
This control is generally inaccurate, because the gain of the programmable gain amplifier is with a large amount of other except the degeneration resistance
Depending on factor.Furthermore extensive and random processing procedure, voltage and/or temperature variations can be respectively presented in a large amount of other factors.
Revealed aspect can imitate part by using the adjustment ratio of programmable gain amplifier, and (it can accurately be adjusted
Whole ratio imitates part) carry out the accurate gain for controlling programmable gain amplifier.This is also directly imitated part and may be programmed by revealed aspect
The gain of gain amplifier is set as being intended to or required gain.Furthermore the setting with applying mechanically the imitative part programmable gain amplifier
Similar setting is that set uses original programmable gain amplifier (such as programmable gain amplifier 100 of Fig. 1), wherein " former
Begin " be just be controlled do not adjust ratio programmable gain amplifier.In this manner it is achieved that revealed aspect can be taken into account
Processing procedure, voltage and/or temperature variations in the gain of programmable gain amplifier.
As shown in Fig. 2, imitative part programmable gain amplifier 202 comprising original programmable gain amplifier (such as Fig. 1 can
Program gain amplifier 100) adjustment ratio version.Imitative part programmable gain amplifier can be adjusted to ratio to may be programmed into original
Any size of gain amplifier.The size can be chosen to provide the standard for the variation that original programmable gain amplifier is subjected to
True model, while be also small enough to and the overall size of the device and/or integrated circuit is not impacted.
Imitative part programmable gain amplifier 202 is at corresponding input interface, i.e., at Vin+ interfaces 206 and Vin- interfaces 208,
Receive direct current (DC) input voltage 204 (such as Vin).DC input voitage 204 can be equal to predetermined voltage (such as Δ v) divided by should
The required gain (Δ v/GAIN) of programmable gain amplifier.
In addition, further include difference amplifier 210.Difference amplifier is a kind of specific use amplifier, its combine for
Measure differential wave, and also referred to as subtracter.For example, difference amplifier 210 can sample defeated in a particular point in time
Go out voltage.According to an implementation aspect, difference amplifier 210 can be low frequency wide (such as low-power) but high-gain amplifier, its
Adjustment control voltage Vctrl is equal to the gain of imitative part programmable gain amplifier 202 to fix one's mind on gain.
The output of imitative part programmable gain amplifier 202 is that (Δ v) makees with similar DC voltage by difference amplifier 210
Compare.Furthermore the input interface 212 and 214 of difference amplifier 210 is connected to supply through respective load resistor 216,218
Voltage (VDD).Input interface 212 and 214 also receives the output of imitative part programmable gain amplifier 202.
According to an embodiment, (Δ v) can be 100mV to predetermined voltage.Furthermore imitative part programmable gain amplifier 202
Output is to be made comparisons by difference amplifier 210 with 100mV DC voltages.It is noted that revealed aspect is using this
It is intended merely to be used as embodiment Deng predetermined voltage and other values of comparison voltage, and by the use of the purpose of 100mV.
The output of difference amplifier 210 is fed to actual programmable gain amplifier (such as programmable gain amplifier
100), at the third transistor 136 of such as Fig. 1.Also the output of difference amplifier 210 is supplied to through backfeed loop 220 imitative
Part programmable gain amplifier 202.
It is intended to export if the output of imitative part programmable gain amplifier 202 is not met, as by difference amplifier 210 sentenced
The person of determining, with incremental rank (such as one increase unit, one reduce unit) to imitate part programmable gain amplifier 202 input voltage into
Row adjustment.
For example, it is intended to if the output of imitative part programmable gain amplifier 202 is less than, the first iteration will can be sent to imitative part
The input voltage of programmable gain amplifier 202 increases the first increment value (such as an increase unit)., should according to an implementation aspect
First iteration can be first time unit.After increasing the input voltage, difference amplifier 210 puts imitative part programmable-gain
The new output valve of big device 202 is made comparisons with ideal value.If the output valve is still too low, secondary iteration will be sent to imitative part and may be programmed increasing
The input voltage of beneficial amplifier 202 adjusts upward the second increment value.This program is repeated, until imitating part programmable gain amplifier
202 output is about be intended to the output phase with untill.
In one embodiment, the second increment value is twice of the first increment value.In a further embodiment, the 3rd is incremented by
It is worth and adds the first increment value for the second increment value.Continue this embodiment, the 4th increment value adds the first increment value for the 3rd increment value.
For example, if the first increment value be 0.1 volt, the second increment value be 0.2 volt, the 3rd increment value be 0.3 volt, the 4th
Increment value is 0.4 volt, and so on.In another embodiment, if the first increment value is 0.15 volt, the second increment value is
0.30 volt, the 3rd increment value is 0.45 volt, and so on.
According to another embodiment, if the output of imitative part programmable gain amplifier 202 is higher than being intended to export, through feedback
Information is fed back to imitative part programmable gain amplifier 202 by circuit 220 from difference amplifier 210.In this implementation, the first iteration
The input voltage is reduced into the first increment value (such as a reduction unit).After reducing input voltage, by imitative part programmable-gain
The output voltage of amplifier 202 is made comparisons with being intended to export.If output voltage is still too high, secondary iteration to input voltage into
Row is adjusted so that input voltage is reduced the second increment value.This program is repeated, the output until imitating part programmable gain amplifier 202
About be intended to the output phase with untill.
In one embodiment, the second increment value is twice of the first increment value.In a further embodiment, the 3rd is incremented by
It is worth and adds the first increment value for the second increment value.Continue this embodiment, the 4th increment value adds the first increment value for the 3rd increment value.
For example, if the first increment value is -0.1 volt, the second increment value is -0.2 volt, and the 3rd increment value is -0.3 volt,
And so on.
According to an embodiment, for increasing the increase unit of input voltage and the reduction unit phase for reducing the voltage
Together.For example, if the first increase unit is 0.12 volt, first reduces unit as -0.12 volt.
However, revealed aspect is not limited to the identical value for increasing unit with reducing unit.It is furthermore disclosed
Aspect be not limited to identical increase unit and/or the identical reduction unit that each iteration is utilized.Conversely, difference can be used instead
Unit.
In one embodiment, if being intended to export and increasing and send to this input for imitating part programmable gain amplifier to obtain
Voltage, last time iteration may increase too high.After this embodiment, which is increased 0.3 volt of Graph One factor by each iteration.
Last time iteration applies 0.9 volt of a voltage.However, the output voltage, which is higher than, is intended to output voltage.Therefore, next iteration
The voltage can be reduced 0.1 volt, and 0.89 volt can be applied.If output voltage is still too high, successive iterations can be by the electricity
Pressure reduces equal amount (0.1 volt) or not same amount (0.2 volt, 0.35 volt etc.).Therefore, can be based on defeated between all iteration
Go out the change of voltage, selectivity adjusts the amount that next iteration reduces unit (or increase unit).
Fig. 3 illustrates the signal characterization of programmable gain amplifier 300.Programmable gain amplifier 300 amplifies input signal
Signal is exported to produce.The first transistor 302 includes the control interface 304 for receiving input signal Vin+, and second transistor
306 include the control interface 308 for receiving input signal Vin-.
The input interface 310 of the first transistor 302 is with the input interface 312 of second transistor 306 through respective load electricity
Resistance device 314 and 316 is connected to supply voltage (VDD).
Furthermore the output interface 318 of the first transistor 302 and the output interface 320 of second transistor 306 are connected to control
Voltage (Vctrl).Refer to Fig. 2, control voltage Vctrl be by including adjustment ratio imitate part programmable gain amplifier with it is poor
The circuit of point amplifier produces.Judge represent adjustment ratio imitate part programmable gain amplifier output and be intended to outlet chamber it is poor
Different value, and the value is fed back into the adjustment ratio and imitates part programmable gain amplifier.
In figure 3, impedor, such as resistor 322 can be connected between output interface 318 and 320.However, one
In a little aspects, not including resistor 322.Third transistor 324 is connected with resistor 322 (if being provided with) with parallel way, and
And supply control voltage Vctrl.Furthermore the 4th transistor 326 can be connected with third transistor 324 with parallel way.Can be at this
Circuit includes subsequent transistor (not shown), and by such subsequent transistor and 324 and the 4th transistor of third transistor
326 are connected with parallel way.
For example, the degeneration resistance of the circuit of Fig. 3 is set so that gain is 1dB.Although 1dB switches are to be connected to control
Voltage Vctrl processed, 2dB are still turned off with follow-up switch.
As described, resistor 322 (or other impedors) may be not connected between two output interfaces 318 and 320.Figure
4 illustrate the one of the programmable gain amplifier 400 illustration signal characterization for substituting specific embodiment.For simplicity, using with
The identical reference numeral of the element of Fig. 1.For programmable gain amplifier 400, switch can be used to reach in source-electrode degradation, and such as the
Shown in one switch 402 and second switch 404.Depending on the desired step of gain for finely tuning programmable gain amplifier 400
Number, also using extra switch.In an implementation aspect, for example, first switch 402 can be with second switch 404
Metal-oxide semiconductor (MOS) (MOS) switchs.However, revealed aspect can utilize other types of switch.
The source-electrode degradation is the gain of intentional step-down amplifier, is intended to make the amplifier more to be controlled and more linear.
If not connecting all switches using and with parallel way, as described, the distortion of programmable gain amplifier 400 is arrived with non-linear meeting height
It is impracticable.Such distortion with it is non-linear be it is related with producing the system of an output, which is not the accurate adjustment of input signal
Ratio imitates part.This system is known as nonlinear system.In the nonlinear system, it is stated that output signal loses relative to input signal
Very.
In view of the shown and exemplary circuit herein, with reference to below scheme figure, will become more apparent can be according to a reality
Apply the method that the wherein one or more of aspect disclosed in example is implemented.The methods of despite for the purpose simply explained and by this, shows
And it is described as a succession of program block, it is reported that, revealed aspect is not restricted because of the number of method or order, because through
By illustrated and described person herein, have some program blocks can occur with other program blocks according to different order and/or essence at the same time
Occur.In addition, and non-required all program blocks illustrated can just implement method described below.It is noted that with it is such
The function that program block is associated can by software, hardware, more than combination or any other suitable means (such as device, be
System, program, component) implement.In addition, also it is noted that can be stored on product hereinafter and this specification institute
The method of announcement, to promote to convey and shift such method to various devices.Those of ordinary skill in the art will
It will be appreciated that, a method can be alternately expressed as a succession of off status or event mutually such as in state diagram.Herein
Revealed various methods can be carried out by the system comprising at least one processor.
Fig. 5 illustrates the example methodology 500 for amplifying input signal.Method 500 starts from 502, there is provided the first transistor with
Second transistor pair.The first transistor can include the first control interface, the first input interface and the first output interface.Second crystal
Pipe can include the second control interface, the second input interface and the second output interface.
In 504, resistor is connected to the first transistor and second transistor pair.For example, the of the resistor
One end is connected to first output terminal, and the second end of the resistor is connected to second output interface.In 506, by the 3rd
Transistor is connected to the first transistor and second transistor pair.For example, which is connected to first output
Interface and second output interface.The third transistor is connected with the capacitor in parallel.
In 508, once apply control voltage to the third transistor and apply input voltage to first control interface,
Second control interface meets with by the control voltage modifications in 510 selectivity, to be connect in first input interface and second input
Produced at mouthful and be intended to export.
According to an implementation aspect, which can be based on closed circuit feedback circuit come selectively modified, the closing
The adjustment ratio that formula circuit feedback circuit includes programmable gain amplifier imitates part.According to some implementation aspects, impedance means can
The first output interface and the second output interface are connected to, and it is in parallel with third transistor (and subsequent transistor).
Fig. 6 illustrates another example methodology 600 for amplifying input signal.In 602, there is provided a pair of transistor.This is to crystalline substance
Body pipe can be the first transistor 114 and second transistor 116, both in Fig. 1 for example.In 604, by this to crystal
Pipe is connected to voltage source VDD.For example, this can pass through transistor respective load resistor and is connected to voltage source VDD.
This is connected to transistor in 604, first current sources and the second current source.In 606, it is right that first switch is connected to this
Transistor.Furthermore in 608, an at least second switch is connected with the first switch with parallel way.According to an implementation aspect
In, first switch, second switch and follow-up switch can be MOS switches.According in another implementation aspect, first switch, second
Switch and follow-up switch can combine the transistor for being used as electric-controlled switch operation.
In 610, apply control voltage at least first switch.The control voltage combining is into for programmable in utilization
The adjustment ratio of gain amplifier imitates the output voltage that programmable gain amplifier is controlled in all levels of part and feedback circuit.
According to an implementation aspect, second switch is closed when first switch is connected to control voltage and connect (closed).According to another
One implementation aspect, second switch are operable to the gain of first switch is increased an increment value.
According to another implementation aspect, the 3rd switch (and follow-up switch) can be with first switch and second switch with parallel way
Connection.3rd switch (and follow-up switch) can be closed when second switch is connected to control voltage to be connect.
Fig. 7 illustrates the example methodology 700 being controlled for the gain rank to programmable gain amplifier.In 702, there is provided
Imitative part programmable gain amplifier.The imitative part programmable gain amplifier for example, can be used in integrated circuit can
Program adjustment ratio (such as smaller) version of gain amplifier.The imitative part programmable gain amplifier can so as to adjust size,
And it is not only restricted to any specific adjusted ratio.
In 704, a value is judged by difference amplifier, which represents output and the institute of the imitative part programmable gain amplifier
The difference being intended between exporting.In 706, the value for representing the difference is provided to the imitative part programmable automation controller through feedback circuit
Device.
In 708, for example, in the method 500 of Fig. 5 and the method 600 of Fig. 6, by the output (tool of the difference amplifier
It has been intended to output valve) used as the control voltage.
Fig. 8 illustrates another example methodology 800 being controlled for the gain rank to programmable gain amplifier.In 802,
The adjustment ratio for providing imitative part programmable gain amplifier imitates part.In 804, the adjustment ratio of programmable gain amplifier is imitated into part
Output be connected to difference amplifier.
In 806, the adjustment ratio for applying direct current (DC) input voltage to the programmable gain amplifier imitates part.Direct current is defeated
Enter the adjustment ratio value for the DC input voitage that voltage can be programmable gain amplifier.For example, DC input voitage
It can be the required gain of predetermined voltage (being represented with Δ V) divided by programmable gain amplifier.
In 808, the adjustment ratio of (such as passing through difference amplifier) analysis programmable gain amplifier imitate the output of part with
The difference being intended between exporting.In 810, based on the difference, the adjustment ratio of the selectively modified programmable gain amplifier
The input voltage of imitative part.
In 810, which may include to imitate part through the adjustment ratio between difference amplifier and programmable gain amplifier
Between backfeed loop, the adjustment ratio of supply control voltage to programmable gain amplifier imitates the input interface of part.
According to an implementation aspect, in 810, which may include to supply adjustment of the different information to programmable gain amplifier
Ratio imitates part, and adjustment ratio is imitated the input voltage of part and increases unit by each iteration of iteration at least once.Root
According to another implementation aspect, in 810, the adjustment ratio which may include to supply different information to programmable gain amplifier is imitated
Part, and adjustment ratio is imitated the input voltage of part and reduces unit by each iteration of iteration at least once.
It is noted that the output of imitative part programmable gain amplifier can be monitored using the mode of pulling over so that the output
Any change is made comparisons with being intended to export, and can dynamically apply mechanically modification., can be with programmable automation controller according to this mode
Device is subjected to processing procedure, voltage and/or temperature variations, controls programmable gain amplifier immediately.
Fig. 9 illustrates the method 900 that input signal is processed into output signal.In 902, input electricity is received across two transistors
Pressure.The input interface of two transistors can pass through respective load resistor and be connected to supply voltage.
In 904, voltage supply will be controlled at least one switch being connected with the output interface of two transistors.The control
Voltage processed is supplied by feedback circuit.In 906, based on the input signal and the control voltage, guiding electric current flows through the phase
Loading resistor is answered, to form the output signal at the input interface of two transistors.In 908, produced from two transistors
Raw output voltage.
According to an implementation aspect, in 904, confession should control voltage to may include that supplying direct current (DC) input voltage to duplication puts
Big device.The DC input voitage can be the required gain of predetermined voltage divided by programmable gain amplifier.In 912, judging should
Difference between the output voltage of replica amplifier and predetermined (example is as desired) output voltage level., can should according to an aspect
Difference is expressed as difference.In 914, using the difference as function, selectively modified direct current supplied to the replica amplifier inputs
The level of voltage.For example, if it is determined that the output is too high, DC input voitage can dynamically be reduced.In another embodiment, if
Judge that the output is too low, can dynamically lift DC input voitage.
According to an implementation aspect, in 914, the level of selectively modified DC input voitage may include comprising one to reduce single
It is modified straight to produce that the voltage of position or an increase unit augments the DC input voitage supplied to the replica amplifier
Flow input voltage.It can determine that another difference between another output voltage of the replica amplifier and the predetermined output voltage level
It is different, and alternative adjustment is supplied to another level of the modified DC input voitage of the replica amplifier.
In addition to the foregoing, also can be used manufacture, programming or engineering technology by revealed patent target be embodied as method,
Equipment or product, to produce hardware, firmware, software, or more any combinations to control to implement disclosed patent mark
Electronic device.Computer readable media may include hard media, w media, non-temporary media or transport medium.
Claims (10)
1. a kind of programmable gain amplifier, it includes：
The first transistor, includes the first control interface, the first input interface and the first output interface；
Second transistor, includes the second control interface, the second input interface and the second output interface；
Resistor, comprising the first end for being connected to first output interface and is connected to the second end of second output interface；With
And
An at least third transistor, first output interface and second output interface are connected to the capacitor in parallel, its
In,
Once apply control voltage to the third transistor, and
Apply input voltage to first control interface,
Second control interface selectively meets with by the control voltage modifications, with first input interface and second input interface
Place produces and is intended to export.
2. programmable gain amplifier as claimed in claim 1, it is further included：
At least one the 4th transistor, is connected with the third transistor and the resistor with parallel way.
3. programmable gain amplifier as claimed in claim 2, wherein, the 4th transistor is included when the third transistor connects
Close the electric-controlled switch connect when being connected to the control voltage, and the 4th transistor is operable to by the increasing of the third transistor
Benefit one increment value of lifting.
4. programmable gain amplifier as claimed in claim 2, it is further included：
At least one the 5th transistor, is connected with the 4th transistor with parallel way.
5. programmable gain amplifier as claimed in claim 1, it is further included：
Imitative part programmable gain amplifier, it includes the adjustment ratio version of the programmable gain amplifier；And
Difference amplifier, it is through assembling output voltage and predetermined output voltage for judging the imitative part programmable gain amplifier
Between difference value represent, wherein, the output of the difference amplifier includes the control voltage.
6. a kind of integrated circuit, it includes：
Amplifier, for producing output signal in amplifier output based on the received input signal of amplifier input,
The amplifier includes：
The first transistor, includes the first control interface, the first input interface and the first output interface；
Second transistor, comprising the second control interface, the second input interface and the second output interface, wherein, which connects
Mouth includes the amplifier with second control interface and inputs, and first input interface is put with second input interface comprising this
Big device output；
First switch, is connected to first output interface and second output interface, wherein, apply to the control of the first switch
Voltage selectively controls the output of the amplifier, and the control voltage is supplied by feedback circuit, the feedback circuit bag
Contain：
Imitative part amplifier, assembles the adjustment ratio version for the amplifier；And
Difference amplifier, combines for judging a value, which represents the output voltage of the imitative part amplifier and predetermined output electricity
Difference between pressure, wherein, the output of the difference amplifier includes the control voltage.
7. integrated circuit as claimed in claim 6, wherein, carry out at least one of following：
A) supply represents the value of the difference and imitates part amplifier to this, and this is imitated part and puts by each iteration of iteration at least once
The input voltage of big device increases unit；Or
B) supply represents the value of the difference and imitates part amplifier to this, and this is imitated part and puts by each iteration of iteration at least once
The input voltage of big device reduces unit.
8. a kind of method that input signal is processed into output signal, it includes：
Input voltage is received across two transistors, wherein, the corresponding input interface of two transistors passes through respective load resistance
Device is connected to supply voltage；
Voltage supply will be controlled at least one switch being connected with the output interface of two transistors, wherein, control electricity
Pressure is supplied by feedback circuit；And
Based on the input signal and the control voltage, guiding electric current flows through the respective load resistor, with two transistors
The input interface at form the output signal.
9. method as claimed in claim 8, wherein, confession should control voltage to include：
DC input voitage is supplied to replica amplifier；
Judge the difference between the output voltage of the replica amplifier and predetermined output voltage level；And
Using the difference as function, the level of the selectively modified DC input voitage supplied to the replica amplifier.
10. method as claimed in claim 9, wherein, the level of the selectively modified DC input voitage includes：
The direct current that voltage comprising a reduction unit or an increase unit is augmented supplied to the replica amplifier is inputted into electricity
Press to produce modified DC input voitage；
Judge another difference between another output voltage of the replica amplifier and the predetermined output voltage level；And
Another level of the selectivity adjustment supplied to the modified DC input voitage of the replica amplifier.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US2015/042587 WO2017019050A1 (en) | 2015-07-29 | 2015-07-29 | Programmable gain amplifier with controlled gain steps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108028628A true CN108028628A (en) | 2018-05-11 |
Family
ID=57884914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580081987.7A Pending CN108028628A (en) | 2015-07-29 | 2015-07-29 | Programmable gain amplifier with controlled gain rank |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP3329590A4 (en) |
| JP (1) | JP2018522490A (en) |
| KR (1) | KR20180036759A (en) |
| CN (1) | CN108028628A (en) |
| CA (1) | CA2993154A1 (en) |
| WO (1) | WO2017019050A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1623281A (en) * | 2002-02-28 | 2005-06-01 | 株式会社瑞萨科技 | High-frequency power amplifier circuit and electronic part for communication |
| US20050248396A1 (en) * | 2004-05-07 | 2005-11-10 | Mario Caresosa | Novel VGA-CTF combination cell for 10 GB/S serial data receivers |
| CN101350605A (en) * | 2008-09-12 | 2009-01-21 | 东南大学 | Improved bipolar type variable gain amplifier with minimum gain control |
| CN101427461A (en) * | 2004-07-26 | 2009-05-06 | 德州仪器公司 | Programmable low noise amplifier and method |
| US20120188018A1 (en) * | 2011-01-25 | 2012-07-26 | Provigent Ltd. | Constant-gain power amplifier |
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|---|---|---|---|---|
| US4549146A (en) * | 1983-06-06 | 1985-10-22 | Cowans Kenneth W | Systems and methods for compensating for element nonlinearities in electronic circuits |
| JP4682419B2 (en) * | 2000-12-22 | 2011-05-11 | 日本テキサス・インスツルメンツ株式会社 | Variable gain amplifier circuit |
| US6570447B2 (en) * | 2001-05-25 | 2003-05-27 | Infineon Technologies Ag | Programmable logarithmic gain adjustment for open-loop amplifiers |
| US7084704B2 (en) * | 2003-07-31 | 2006-08-01 | Skyworks Solutions, Inc. | Variable gain amplifier system |
| JP2007208612A (en) * | 2006-02-01 | 2007-08-16 | Sanyo Electric Co Ltd | Automatic gain control circuit and receiver employing the same |
| US7973602B2 (en) * | 2009-05-06 | 2011-07-05 | Mindspeed Technologies, Inc. | Variable gain amplifier |
| US7956687B2 (en) * | 2009-06-10 | 2011-06-07 | Broadcom Corporation | Constant-bandwidth variable gain amplifier |
| KR101742343B1 (en) * | 2009-11-30 | 2017-05-31 | 에스티마이크로일렉트로닉스 에스.알.엘. | Driving method for obtaining a gain linear variation of a transconductance amplifier and corresponding driving circuit |
| JP2011182266A (en) * | 2010-03-02 | 2011-09-15 | Renesas Electronics Corp | Difference signal receiving circuit, and semiconductor device |
| JP5868885B2 (en) * | 2013-03-07 | 2016-02-24 | 株式会社東芝 | Variable gain amplifier circuit |
-
2015
- 2015-07-29 CA CA2993154A patent/CA2993154A1/en not_active Abandoned
- 2015-07-29 WO PCT/US2015/042587 patent/WO2017019050A1/en active Application Filing
- 2015-07-29 EP EP15899841.9A patent/EP3329590A4/en not_active Withdrawn
- 2015-07-29 CN CN201580081987.7A patent/CN108028628A/en active Pending
- 2015-07-29 KR KR1020187006034A patent/KR20180036759A/en not_active Application Discontinuation
- 2015-07-29 JP JP2018503506A patent/JP2018522490A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1623281A (en) * | 2002-02-28 | 2005-06-01 | 株式会社瑞萨科技 | High-frequency power amplifier circuit and electronic part for communication |
| US20050248396A1 (en) * | 2004-05-07 | 2005-11-10 | Mario Caresosa | Novel VGA-CTF combination cell for 10 GB/S serial data receivers |
| CN101427461A (en) * | 2004-07-26 | 2009-05-06 | 德州仪器公司 | Programmable low noise amplifier and method |
| CN101350605A (en) * | 2008-09-12 | 2009-01-21 | 东南大学 | Improved bipolar type variable gain amplifier with minimum gain control |
| US20120188018A1 (en) * | 2011-01-25 | 2012-07-26 | Provigent Ltd. | Constant-gain power amplifier |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3329590A1 (en) | 2018-06-06 |
| KR20180036759A (en) | 2018-04-09 |
| JP2018522490A (en) | 2018-08-09 |
| WO2017019050A1 (en) | 2017-02-02 |
| CA2993154A1 (en) | 2017-02-02 |
| EP3329590A4 (en) | 2019-07-03 |
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