Capacitor coupled dynamic bias boosting circuit for a power amplifier
A technology for power amplifiers and amplifier circuits, which is applied in improving amplifiers to reduce temperature/power supply voltage changes, amplifiers, and components of amplifier devices, etc., and can solve problems such as high power consumption, no signal, and unfavorable operation of bias circuits.
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[0017] A schematic diagram of a high frequency amplifier circuit 1 according to the present invention is shown in FIG. 1 . The amplifier circuit includes an amplifier transistor 11 and a bias circuit 2 coupled to the base of the amplifier transistor 11 through a resistor 10 . The bias circuit 2 consists of coupling at V CC 6 bipolar transistors (12-17) and two current sources 18 and 19 between GND and GND will be further described below. An input coupling capacitor 20 is used to couple an input signal from the driver stage 3 of the amplifier to the base of the amplifier transistor 11 which is connected in a common emitter configuration and coupled through an inductor 21 at V CC and GND. The high frequency amplifier circuit 1 outputs from the collector of the transistor 11 through a capacitor 22 . The driver stage 3 includes a driver transistor 23 whose base input is coupled to a capacitor 24, a V CC connected, and connected to the output of capacitor 20. The driver transi...
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