CN116940895A - Class A amplifying device - Google Patents
Class A amplifying device Download PDFInfo
- Publication number
- CN116940895A CN116940895A CN202280014520.0A CN202280014520A CN116940895A CN 116940895 A CN116940895 A CN 116940895A CN 202280014520 A CN202280014520 A CN 202280014520A CN 116940895 A CN116940895 A CN 116940895A
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- energy source
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- 230000003321 amplification Effects 0.000 claims description 11
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F1/00—Originals for photomechanical production of textured or patterned surfaces, e.g., masks, photo-masks, reticles; Mask blanks or pellicles therefor; Containers specially adapted therefor; Preparation thereof
- G03F1/26—Phase shift masks [PSM]; PSM blanks; Preparation thereof
- G03F1/30—Alternating PSM, e.g. Levenson-Shibuya PSM; Preparation thereof
Abstract
The invention relates to a class A amplifying device, in particular to a class A amplifying device which uses energy sources to be connected in series in a circuit to eliminate the cut-off of a full-control device, has high energy efficiency and meets the requirement of high dynamic class A output, and comprises a device for amplifying, wherein the device comprises a first device and a second device, the first device and the second device form a push-pull amplifying circuit, and the class A amplifying device also comprises a diode and an energy source; the device also comprises a diode and an energy source; the first electrode of the device and the second electrode of the device are connected in series with the energy source, and the diode is connected in parallel with the energy source. The invention has the advantages of reasonable design, convenient implementation, high energy efficiency and large class A output dynamic range.
Description
The invention relates to a class A amplifying device, in particular to a class A amplifying device which uses energy sources to be connected in series in a circuit to eliminate the cut-off problem of a fully-controlled device and has high energy efficiency and high dynamic class A output.
In the traditional amplifying device, when the devices (including triode, field effect transistor, IGBT and other fully-controlled devices) are cut off (such as audio push-pull power amplifier, pulse amplification and the like), various related problems (such as switching distortion, crossover distortion, working frequency reduction and the like) can be caused, and the traditional class A amplifying device has the problems of extremely large quiescent current and extremely low energy efficiency; class A and class B amplifying devices also have the problems of high static power consumption and low efficiency, and can only meet the requirements of low-power class A output, and have the defect of small dynamic range of class A output; the second page of the literature "audio power amplifier design handbook" by the well-known power amplifier designer Douglas Self, the sixth edition of chinese edition, also discusses various drawbacks of the prior art, and reveals that the "XD-class (intermodulation substitution) amplifier" invented by him in the united kingdom also cannot completely eliminate crossover distortion and switching distortion problems caused by device cut-off.
Disclosure of Invention
The invention aims to solve the technical background problem and provide the class A amplifying device which is convenient to implement and can meet the requirement of high-dynamic class A output under the condition of lower quiescent current (high energy efficiency).
The aim of the invention is achieved by the following technical scheme:
the class A amplifying device comprises a device for amplifying, a diode and an energy source, wherein the device comprises a first device and a second device, the first device and the second device form a push-pull amplifying circuit; the first electrode of the device and the second electrode of the device are connected in series with the energy source, and the diode is connected in parallel with the energy source.
Working principle: the energy source is connected in series in the bias input circuit of the device, the energy source always maintains output current in the working process, and only a small quiescent current is provided by the energy source, so that the first device and the second device can be maintained in a conducting state under the alternating (full-power) high-current output state of the first device and the second device, full-power class A output of the amplifying device is realized, and distortion (switching distortion, crossover distortion and the like) caused by cut-off of the devices is eliminated.
The invention has the advantages of reasonable design, convenient implementation, high energy efficiency and large class A output dynamic range.
Fig. 1 is a schematic diagram of an embodiment of a class a amplifying device of the present invention.
Fig. 2 is a schematic diagram of a class a amplifying device according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a third principle of the class a amplifying device according to the present invention.
Fig. 4 is a fourth schematic diagram of an embodiment of the class a amplifying device of the present invention.
In the first embodiment of the invention:
the class A amplifying device shown in fig. 1 comprises a device Q1 and a device Q2 for amplifying, wherein the device Q1 and the device Q2 form a push-pull amplifying circuit, and the device also comprises diodes (D1 and D2) and an energy source E1 (formed by a battery BT serial current limiting element R); the first electrode P1-1 of the device Q1, the second electrode P1-2 of the device Q1, the energy source E1, the second electrode P2-2 of the device Q2 and the first electrode P2-1 of the device Q2 are connected in series to form a bias input circuit; the third electrode P1-3 of the device Q1, the second electrode P1-2 of the device Q1, the energy source E1, the second electrode P2-2 of the device Q2 and the third electrode P2-3 of the device Q2 are sequentially connected in series to form a series circuit, the second electrodes (P1-2 and P2-2) are used for outputting amplified signals, and the first electrode P1-1 of the device Q1 and the first electrode P2-1 of the device Q2 are used for inputting signals before amplification; the diodes D1 and D2 are connected in series, the common node N1 of the diodes D1 and D2 is used for being connected with the load RL, namely the second electrodes (P1-2, P2-2) output amplified signals through the diodes (D1, D2), and a series circuit formed by the diodes D1 and D2 is connected with the energy source E1 in parallel.
Working principle: for easy understanding, fig. 1 includes an input unit B (other circuits may also be adopted), and constant voltage bias is implemented on a device Q1 and a device Q2 by using the input unit B, where the device Q1 and the device Q2 operate in an amplifying region (a quiescent current may be selected from a few milliamperes to tens of milliamperes), so as to eliminate distortion caused by cut-off of a diode D1 and a diode D2, and use the devices for linear amplification (such as audio amplification); before the node N1 outputs a signal, the diode D1 (diode D2) is turned on, and then the device Q1 (device Q2, either) amplifies the current to the node N1; when the input signal is of high amplitude, under the condition that either the diode D1 or the diode D2 is cut off, the current generated by the energy source E1 (the output voltage of the energy source E1 pressurizes the bias input circuit) enables the devices Q1 and Q2 to maintain the on state, and various problems caused by the cut-off of the devices Q1 and Q2 are eliminated.
In the second embodiment of the invention:
a class a amplifying device as shown in fig. 2 is different from the first embodiment in that Q1 and Q2 are used as a driving stage for amplifying, third electrodes (P1-3 and P2-3) are connected in series with resistors (R1 and R2), and the third electrodes (P1-3 and P2-3) output amplified signals; the present embodiment may further include a circuit C including a device Q3 (triode), a device Q4 (triode), a diode D3, a diode D4, and a second bias circuit E2 (the output electromotive force may be selected between 0.3 volts and 2 volts); the common node of the third electrode of the device Q1 and the resistor R1 (first resistor) is connected with the first electrode of the device Q3 through a diode D3, and the common node of the third electrode of the device Q2 and the resistor R2 (second resistor) is connected with the first electrode of the device Q4 through a diode D4; the second electrode of the device Q1 is connected with the third electrode of the device Q3 through a diode D1, and the second electrode of the second device Q2 is connected with the third electrode of the device Q4 through a diode D2; the third electrode of the device Q3 and the third electrode of the device Q4 are connected to a load RL at a common node N1; the first electrode of the device Q3 and the first electrode of the device Q4 are connected with the second bias circuit E2, the current provided by the second bias circuit E2 overcomes the cut-off of the device Q3 and the device Q4, and in practical application, two ends of the node N1 can be respectively connected with a resistor in series.
The third embodiment of the invention:
the first class amplifying device shown in fig. 3 is different from the first class amplifying device in that Q1 and Q2 are used as a push stage, a resistor RA (which may be formed by connecting a plurality of diodes in series) connected in series with a diode D1 (which is selected according to need) is used for raising the potential difference between the nodes N1-1 and N1-2, so as to facilitate direct current coupling to the subsequent stage, a second electrode (P1-2 and P2-2) is used for outputting an amplified signal, the diode D1 is connected in parallel with an energy source E1, the anode of the energy source E1 is connected with the cathode of the diode D1 (through the resistor RA), and the cathode of the energy source E1 is connected with the anode of the diode D1; when the diode D1 is turned off, the current generated by the energy source E1 maintains the devices Q1 and Q2 in an on state, and various problems of the amplifying device due to the turn-off of the devices Q1 and Q2 are eliminated.
The present embodiment may further include a circuit C including a diode D3, a diode D4, a device Q3, a device Q4, a second bias circuit E2 (output electromotive force is greater than 3 times of an on voltage of the device Q3); the second electrode of the device Q1 is connected with the second electrode of the device Q2 through a first diode D1 (a current limiting element RA is selected according to the need), the second electrode of the device Q1 is connected with the first electrode of the device Q3 through a diode D3, and the second electrode of the device Q2 is connected with the first electrode of the device Q4 through a fourth diode D4; the first electrode of the third device Q3 and the first electrode of the device Q4 are connected with the second bias circuit E2, the current provided by the second bias circuit E2 overcomes the cut-off of the device Q3 and the device Q4, and the common node of the second electrode of the device Q3 and the second electrode of the device Q4 is used for outputting amplified signals.
Fourth embodiment of the invention
The principle of operation of the class a amplifying device shown in fig. 4 is the same as that described above, and is not described in detail herein.
The above embodiment may further include a loop-free negative feedback amplifying device formed by a circuit B, where the circuit B may fully exert the technical advantages of the present invention, and the circuit B includes a first coupling element C1 (preferably a capacitor), a second coupling element C2 (preferably a capacitor), and an energy output type photoelectric unit E3 (the output electromotive force is greater than 3 times of the turn-on voltage of the device Q1), where the first coupling element C1 is connected to the first electrode of the first device Q1, and the second coupling element C2 is connected to the first electrode of the second device Q2; the output two ends of the photoelectric unit E3 are respectively connected with the first electrode of the first device Q1 and the first electrode of the second device Q2, and the load-discharging unit RV (preferably, a resistor may be used) connected in parallel with the photoelectric unit E3 is used for discharging load.
In the above embodiment, the diodes (D1, D2) may be connected in an equipotential manner without considering the influence of the diodes on distortion, that is, without biasing the input unit B, the first electrode of the device Q1 is connected to the first electrode of the device Q2, and the first electrode may be connected to ground through a resistor, which is suitable as a digital power amplifier (i.e., pulse signal amplification, or digital audio power amplifier); when the first electrode of the device Q1 and the first electrode of the device Q2 are connected in a non-equipotential manner, the current passing through the device Q1 (Q2) is equal to the current of the diode D1 (D2) plus the energy source E1; the first electrode of the device Q1, the second electrode of the device Q1, the diode (D1, D2, which can be independently D1), the second electrode of the device Q2, and the first electrode of the device Q2 are connected in series to form a bias input circuit, and before the output of the signal of N1 (or N1-1, N1-2), the diode (D1, D2) is conducted first for eliminating the distortion caused by the cut-off of the diode (D1, D2), and the bias input circuit is injected: it is proposed that the quiescent current design via the diodes (D1, D2) is selected in the interval 2 to 5 times the output current value of the energy source E1.
The above embodiments D1, D2, D3, D4 are defined as the first diode, the second diode, the third diode, the fourth diode, respectively; q1, Q3, Q4 are defined as a first device, a second device, a third device, and a fourth device, respectively.
The above embodiment has the following features:
1. under the cut-off condition of the diodes (D1, D2), the quiescent current passed by the devices (Q1, Q2) depends on the current provided by the energy source E1, and the current is hardly influenced by the conduction or non-conduction of the diodes (D1, D2) and the exaggeration (or current amplification factor) of the devices (Q1, Q2), so that the mass production consistency is good;
2. the energy source with the output loops (the common electrode of the input loop and the output loop) connected in series has the advantages of stable output current and almost zero introduced interference;
3. the energy source is connected in series in the bias input circuit, the energy source always maintains output current in the working process, so that balanced bias to devices (Q1, Q2) is realized, the current does not pass through a load, distortion (switching distortion, crossover distortion and the like) caused by cut-off of the devices is eliminated, compared with a traditional class A amplifying device, the static power consumption is extremely low (the energy efficiency of the class B power amplifier is approximate), the dynamic range is larger, full-power class A output of the amplifying device can be realized, the invention has strong adaptability to load impedance, and can meet the requirement of class A driving of loads with different impedances without adjusting the working points of the devices.
The energy source E1 is an energy source with an output electromotive force in a zero point 3V-3V range, the energy source can be a battery (the battery can be connected with a charging circuit of a pair of batteries, the battery can also be designed in a detachable structure for conveniently replacing the battery), when the battery with the voltage source characteristic is adopted, the battery can be connected with the current limiting element R in series, the energy source can also be a photoelectric unit as shown in the E1 (E2, E3) in the figures 2, 3 and 4, and also can be defined as a photocell (used for audio power amplifier), the inside of the energy source can comprise a photoelectric conversion element (preferably consisting of a plurality of photodiodes in parallel, or in series-parallel), and further comprises an electro-optic conversion element (preferably adopts a plurality of light emitting diodes), and the photoelectric conversion element and the second electrode of the device (Q1 and Q2) are packaged into a module by utilizing the photoelectric conversion element, so that the photoelectric conversion element E1 (E2 and E3) is convenient to use; the drive current of the photoelectric conversion element is adjusted to adjust the output current of the energy source.
The devices (Q1, Q2, one is N type and the other is P type) for amplifying are all-control devices, which can be field effect transistors, triodes, IGBT (insulated gate bipolar transistor) or electron tubes, and also can be Darlington devices; the second electrode is a common electrode of an input loop and an output loop of the device; the specific types of Q1 and Q2 in the above embodiment can be flexibly changed and selected according to the requirement, wherein the first electrode is a base electrode, or a grid electrode, the second electrode is a source electrode, or a cathode, or an emitter of the device, and the third electrode is a collector, or a drain, or an anode; the first electrode and the second electrode can be connected with a resistor in series according to actual needs; the diode is preferably a schottky diode, a switching diode, a fast recovery diode, a high frequency diode, or the like, which has a switching speed higher than that of the device and a turn-on voltage smaller than that of the device.
The invention is especially suitable for linear (analog) amplification (such as high-fidelity audio amplification, high-dynamic class A amplification is realized, namely class HA amplification), and high-performance D (digital, HD, a loudspeaker at the load end of a node N1 can be connected with a filter unit; the method can also be used for amplifying other high-frequency switches (pulses); energy sources claiming to be of the same use as the present invention also fall within the scope of the present patent.
The invention has the advantages of reasonable design, convenient implementation, high energy efficiency and large class A output dynamic range.
Claims (12)
- The class A amplifying device comprises a device for amplifying, wherein the device comprises a first device and a second device, and the first device and the second device form a push-pull amplifying circuit, and the class A amplifying device is characterized in that: the device also comprises a diode and an energy source; the first electrode of the device and the second electrode of the device are connected in series with the energy source, and the diode is connected in parallel with the energy source.
- The class a amplifying device according to claim 1, wherein: the first electrode of the first device, the second electrode of the first device, the energy source, the second electrode of the second device and the first electrode of the second device are connected in series to form a bias input circuit, and the third electrode of the first device, the second electrode of the first device, the energy source, the second electrode of the second device and the third electrode of the second device form a series circuit.
- The class a amplifying device according to claim 2, wherein: the diode is connected in series with a resistor.
- The class a amplifying device according to claim 2, wherein: the first electrode is used for inputting signals before amplification, and the second electrode or the third electrode is used for outputting amplified signals.
- The class a amplifying device according to claim 2, wherein: the first electrode of the first device is connected with the first electrode of the second device in an equipotential or non-equipotential manner.
- The class a amplifying device according to claim 2, wherein: the anode of the energy source is connected with the cathode of the diode, and the cathode of the energy source is connected with the anode of the diode.
- The class a amplifying device according to claim 2, wherein: the diode comprises a first diode and a second diode, the first diode and the second diode are connected in series, and a common node of the first diode and the second diode is used for being connected with a load.
- The class a amplifying device according to claim 7, wherein: the series circuit formed by the first diode and the second diode is connected with the energy source in parallel.
- The class a amplifying device according to claim 2, wherein: the energy source is a battery.
- The class a amplifying device according to claim 9, wherein: the battery is connected in series with a current limiting element.
- The class a amplifying device according to claim 2, wherein: the diode comprises a first diode, a second diode, a third device, a fourth device, a third diode, a fourth diode, a first resistor, a second resistor and a second bias circuit; the common node of the third electrode of the first device and the first resistor is connected with the first electrode of the third device through the third diode, and the common node of the third electrode of the second device and the second resistor is connected with the first electrode of the fourth device through the fourth diode; the second electrode of the first device is connected with the third electrode of the third device through the first diode, and the second electrode of the second device is connected with the third electrode of the fourth device through the second diode; a third electrode of the third device and a third electrode of the fourth device are connected with a load through a common node; the first electrode of the third device and the first electrode of the fourth device are connected with the second bias circuit.
- The class a amplifying device according to claim 2, wherein: the diode is a first diode and further comprises a third diode, a fourth diode, a third device, a fourth device and a second bias circuit; the second electrode of the first device is connected with the second electrode of the second device through the first diode, the second electrode of the first device is connected with the first electrode of the third device through the third diode, and the second electrode of the second device is connected with the first electrode of the fourth device through the fourth diode; the first electrode of the third device and the first electrode of the fourth device are connected with the second bias circuit, and a common node of the second electrode of the third device and the second electrode of the fourth device is used for outputting amplified signals.
Applications Claiming Priority (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2021111945423 | 2021-10-13 | ||
| CN202111194542 | 2021-10-13 | ||
| CN202111206656 | 2021-10-17 | ||
| CN2021112066565 | 2021-10-17 | ||
| CN202210147507 | 2022-02-17 | ||
| CN2022101475074 | 2022-02-17 | ||
| CN2022085989 | 2022-04-09 | ||
| CNPCT/CN2022/085989 | 2022-04-09 | ||
| PCT/CN2022/124759 WO2023061387A1 (en) | 2021-10-13 | 2022-10-12 | Class-a amplification apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116940895A true CN116940895A (en) | 2023-10-24 |
Family
ID=85987311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202280014520.0A Pending CN116940895A (en) | 2021-10-13 | 2022-10-12 | Class A amplifying device |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN116940895A (en) |
| AU (1) | AU2022362476A1 (en) |
| WO (1) | WO2023061387A1 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4366447A (en) * | 1981-01-22 | 1982-12-28 | Pioneer Electronic Corporation | Push-pull amplifier circuit |
| JP2013066100A (en) * | 2011-09-20 | 2013-04-11 | Hitachi Kokusai Electric Inc | Power circuit |
| CN205792471U (en) * | 2016-01-05 | 2016-12-07 | 河南太行全利重工股份有限公司 | Electronic type power amplifier |
| CN206364781U (en) * | 2016-01-24 | 2017-07-28 | 广州市金矢电子有限公司 | Half control type device drive device and hybrid devices |
| CN112290777A (en) * | 2020-09-16 | 2021-01-29 | 深圳市安捷芯源半导体有限公司 | Current amplifying circuit |
-
2022
- 2022-10-12 WO PCT/CN2022/124759 patent/WO2023061387A1/en active Application Filing
- 2022-10-12 AU AU2022362476A patent/AU2022362476A1/en active Pending
- 2022-10-12 CN CN202280014520.0A patent/CN116940895A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023061387A1 (en) | 2023-04-20 |
| AU2022362476A1 (en) | 2023-10-12 |
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