Power amplifier chip biasing circuit based on GaAs HBT process
A bias circuit and power amplifier chip technology, applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve the problems of unsuitable power tubes, limit circuit universality, increase area cost, etc., and achieve easy on-chip integration, Good promotion value, simple structure effect
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Embodiment 1
[0024] Embodiment 1, the current mirror includes a capacitor C1, a first input side HBT transistor M A0 and the first output side HBT tube M B0 . The first input side HBT tube M A0 As the input side, the first output side HBT tube M B0 as the output side. HBT tube M on the first input side A0 After the base and the collector are short-circuited, they are connected to the second positive temperature coefficient resistor R2, and the emitter is grounded. HBT tube M on the first output side B0 The base is connected to the first input side HBT tube M A0 The base, collector external reference voltage V REF , the emitter is used for external output bias current I bias . The capacitor C1 is connected to the first output side HBT tube M B0 between emitter and ground.
Embodiment 2
[0025] Embodiment two, such as figure 2 As shown, the current mirror includes capacitor C1, the second input side HBT tube M A1 , the third input side HBT tube M A2 , the second output side HBT tube M B1 and the third output side HBT tube M B2 . The second input side HBT tube M A1 and the third input side HBT tube M A2 Composing the input side, the second output side HBT tube MB1 and the third output side HBT tube M B2 form the output side. The second input side HBT tube M A1 The base and the collector are short-circuited and connected to the second positive temperature coefficient resistor R2, and the emitter is connected to the third input side HBT tube M A2 the emitter. The third input side HBT tube M A2 The base and emitter are shorted and the collector is grounded. The second output side HBT tube M B1 and the third output side HBT tube M B2 Connect in parallel, connect the second input side HBT tube M after the base is common A1 The base and the collector a...
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