| 摘要 |
A method ( 400 ) for controlling power and an amplifier and associated power control circuit ( 100 ) with a power amplifier ( 110 ) coupled through a current sensing resistor (Rsen) to a supply voltage line (vcc). There is also a current to voltage converter ( 120 ) having a converter output ( 135 ) and at least one converter input, the converter input being coupled to the supply voltage line (Vcc) of the power amplifier ( 110 ). A voltage reference providing circuitry ( 140 ) is coupled to a second input ( 152 ) of an integrator ( 150 ) that also has an integrator output ( 153 ) and a first input ( 151 ) coupled to the converter output ( 135 ) and a direct current biasing circuit ( 195 ) couples the integrator output (( 153 ) to an amplifier input ( 111 ) of amplifier ( 110 ). The method ( 400 ) and circuit ( 100 ) use a time dependent pre-defined voltage characteristic supplied to the integrator ( 150 ).
|
