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Power amplifier based on high voltage great current operation amplifier

A technology of operational amplifiers and power amplifiers, applied in the direction of power amplifiers, etc., can solve the problems of bulky circuits and achieve high output power, small impact impact, and fast response

Inactive Publication Date: 2009-06-17
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Such circuits are often bulky, so the demand for integrated low-frequency power drive circuits is on the rise

Method used

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  • Power amplifier based on high voltage great current operation amplifier
  • Power amplifier based on high voltage great current operation amplifier
  • Power amplifier based on high voltage great current operation amplifier

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Embodiment Construction

[0015] Such as figure 1 As shown, the power amplifier based on the high-voltage and high-current operational amplifier includes a main amplifying circuit, an auxiliary circuit and an output unit; wherein: the main amplifying circuit includes an input buffer circuit, a U / A conversion circuit, and a current expansion unit; one end of the input buffer circuit is connected to the U / A The A conversion circuit is connected, the other end of the input buffer circuit is connected with the D / A converter of the host PC, one end of the current expansion unit is connected with the U / A conversion circuit, and the other end of the current expansion unit is connected with the floating load interface in the output unit; The auxiliary circuit includes a voltage boost unit and a surge interference release unit; one end of the voltage boost unit is connected to a DC stabilized power supply, the other end of the voltage boost unit is connected to a U / A conversion circuit, and the anti-surge interf...

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PUM

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Abstract

The present invention discloses a power amplifier based on the high pressure large current calculation amplifier which comprises a main amplification circuit, an assistant circuit and an output unit. The main amplification circuit includes an input snubber circuit composed of the voltage following circuits, an U / I conversion circuit and a current extension unit; the assistant circuit mainly comprises voltage promotion units; the main output signal is current signal. The constant-current power amplifier has the features of large power, rapid response speed, high precision, good program control performance and etc. The calculation amplifier is chosen as the calculation device of the main amplification circuit, so as to realize the function of limiting current and short circuit protection, and assure the operation safety of the amplifier. The floating loading method is used as the design of the loading grounding mode, the negative feedback is composed of feedback resistor, so as to realize the function of automatic adjustment and stabilizing current.

Description

technical field [0001] The invention relates to an analog electronic circuit, in particular to a power amplifier based on a high-voltage and high-current operational amplifier. Background technique [0002] Power amplifiers are widely used in communication systems and various electronic devices to provide sufficient signal power for loads. In applications such as driving motors, sonar transducers, coil / magnetic field excitation, programmable power supplies, audio, etc., power amplifiers or power drivers with low frequency (ultra-low frequency) operation, high power output, high efficiency, intelligent control and protection functions are required . Such circuits are often bulky, so the demand for integrated low-frequency power drive circuits is on the rise. At present, voltage type power amplifiers are more common. However, in some applications, it is necessary to have a constant current power amplifier with good program control performance and constant output of large cu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F3/20
Inventor 葛荣杰邬义杰徐君赵章荣
Owner ZHEJIANG UNIV