High-frequency power amplifying circuit

A power amplifying circuit and amplifying circuit technology, applied in the direction of power amplifier, DC amplifier with modulator-demodulator, etc., can solve the problem of long rise time, large fall time of output radio frequency signal, and delay of laser cutting off by marker machine. Long and other problems, to achieve the effect of eliminating the match head phenomenon, increasing the descending speed, and increasing the descending time

Inactive Publication Date: 2006-11-22
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

The performance index given by the Q switch driver of NEOS company is that the rise time is less than 500ns, and the fall time is less than 100ns; The index of falling time is much better than that of rising time. If the rising time is too long, it means that the time delay for the marking machine to turn off the laser is too long,

Method used

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Embodiment Construction

[0019] The invention includes a modulator and a high frequency power amplifier.

[0020] Depend on figure 1 As shown, the modulator receives an externally input digital modulation signal or analog modulation signal, and amplifies the input digital modulation signal or analog modulation signal to a modulation signal with strong drive capability to provide the required signal for the high-frequency power amplifier, high-frequency power The amplifier amplifies the incoming RF signal to the level required by the load.

[0021] Depend on figure 2 As shown, the modulator is composed of a signal amplification circuit 1, an addition circuit 2 and a drive circuit 3. The signal amplifying circuit 1 and the adding circuit 2 adopt general signal amplifying circuits and adding circuits; the driving circuit 3 adopts a specially designed driving circuit.

[0022] Depend on image 3 As shown, a connection method of the signal amplifying circuit 1 can be: resistor R 2 One end A is connec...

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Abstract

The invention discloses a high-frequency power amplifying circuit, which consists of modulator and power amplifier, wherein the modulator includes signal amplification circuit, add circuit and drive circuit; the power amplifier consists of first stage amplifying circuit and secondary amplifying circuit; the secondary amplifying circuit has high-frequency choke which adopts magnet ring with manganese- zinc or nickel- zinc material. The invention improves the envelope rise and descent rate of final export radiofrequency signal.

Description

technical field [0001] The invention belongs to the technical field of power amplification, and is especially used for a high-frequency power amplification system requiring high-speed switching. Background technique [0002] Generally, the efficiency of a high-frequency power amplifier increases as the output power of the amplifier increases in a linear range, reaching a maximum efficiency at a certain point in the amplifier's saturated operation. [0003] In the FM communication system, due to the constant envelope nature of the signal, the amplifier can always be in a saturated state, so that higher efficiency can be achieved, but in the communication system that requires linear amplification, the signal envelope is no longer constant, so the amplifier efficiency is reduced. [0004] In the field of laser marking, at present, the well-known manufacturers of acousto-optic Q-switch drivers for Nd:YAG laser marking machines include NEOS in the United States and Guilin Xingch...

Claims

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Application Information

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IPC IPC(8): H03F3/20H03F3/38
Inventor 刘玉吴旦昱张瑛黄勇肖振宇钟国辉
Owner HUAZHONG UNIV OF SCI & TECH
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