Patent ID: 6657499
Filing Date: 2003-12-02
Classification: H03F

Abstract:
A bias controller comprising:a bias detector operable to detect a bias current associated with a device controlled by the bias controller and produce a proportional sensed bias voltage; a reference comparator operable to compare the bias voltage to a reference voltage and produce a first control signal operable to adjust a bias output of the bias controller; a memory component storing a plurality of reference voltage settings, one for each of a plurality of available modes of operation of the device, the memory component including a mode setting input, a reference voltage output signal and a bias voltage output signal; and a reference voltage adjustment circuit adjusting the reference voltage applied to the reference comparator in accordance with the mode of the device as controlled by the reference voltage output signal; and a bias adjustment circuit adjusting a bias voltage to be applied to the device in accordance with the mode of the device as controlled by the bias voltage output signal.