A Pulse Power Amplifier Using Drain Modulation
A technology of pulse power and drain modulation, applied in power amplifiers, improved amplifiers to improve efficiency, etc., can solve the problems of increased chip pins and increased application costs, and achieve high output efficiency, high Q value, and reduced power loss. Effect
Active Publication Date: 2017-08-11
SOUTHEAST UNIV +2
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Problems solved by technology
[0006] The second is that there is a DC bias circuit in the power amplifier circuit
High-frequency choke coils are generally implemented with off-chip inductors, which will lead to problems such as increasing chip pins and increasing application costs.
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[0024] see figure 2 , the present invention is provided with a bias circuit 1, a bias circuit 2, a driver stage amplifying circuit and an output stage amplifying circuit. The radio frequency non-inverting differential input signal INR and the inverting input signal INL are respectively connected to the non-inverting input terminal and the inverting input terminal of the amplifying circuit of the driving stage. The output terminal of the driving stage amplifier circuit is connected to the input terminal of the output stage amplifier circuit, and the output terminal of the output stage amplifier circuit outputs two-stage amplified differential radio frequency output signals as OUTR and OUTL. The bias circuit 1 is connected to the output stage amplifier circuit to provide it with a static DC bias, and the bias circuit 2 is connected to the driver stage amplifier circuit to provide it with a static DC bias. Pulse control signal V CTRL The pulse modulator is added to the bias ci...
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A pulse power amplifier using drain modulation, the pulse modulation circuit is multiplexed as a part of the power amplifier circuit to solve the large voltage drop caused by using a single transistor as the control tube in the traditional pulse modulation circuit, resulting in output power and Reduced efficiency. It includes an inductance LD with a center tap, a driver stage amplifier circuit, an output stage amplifier circuit, and a bias circuit 1 and a bias circuit 2 that provide DC bias for the output stage amplifier circuit and the driver stage amplifier circuit respectively. The RF differential input signal is connected to the driver The non-inverting input terminal and the inverting input terminal of the stage amplifier circuit, the output terminal of the drive stage amplifier circuit couples the amplified RF signal to the input terminal of the output stage amplifier circuit through a capacitor, and the final output stage amplifier circuit outputs two differential signals of the same phase and the reverse phase Signal.
Description
technical field [0001] The invention relates to a pulse power amplifier in a radar system, in particular to a pulse power amplifier using drain modulation. Background technique [0002] At present, radar systems have been widely used in national defense and civilian products, and have a profound impact on people's daily life. Pulsed Power Amplifier (Pulsed Power Amplifier, PPA) is a key module of the radar system, which determines the performance of the entire system. A pulse power amplifier is a power amplifier that outputs intermittent radio frequency signals under the action of a control signal. As the performance of the radar system is getting better and better and the volume is getting smaller and smaller, the pulse power amplifier chip with small area, low loss and high performance has become a research hotspot in recent years. [0003] In the pulse power amplifier circuit, the input pulse signal of the pulse modulator circuit contains high level (active level) and l...
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IPC IPC(8): H03F1/02H03F3/20
Inventor 李智群文武林晓娟马武何世栋刘扬罗磊景永康王曾祺程国枭
Owner SOUTHEAST UNIV