Method and circuit for controlling power amplifiers
First Claim
1. 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 mode of operation of the device, the memory component including a mode setting input and a reference 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.
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Accused Products
Abstract
A bias controller includes a bias detector, a reference comparator, a memory component, and a reference voltage. The bias detector is operable to detect a bias current associated with a device controlled by the bias controller and produce a proportional sensed bias voltage. The reference comparator is 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. The memory component stores a plurality of reference voltage settings, one for each mode of operation of the device, the memory component including a mode setting input and a reference voltage output signal. The reference voltage adjustment circuit adjusts the reference voltage applied to the reference comparator in accordance with the mode of the device as controlled by the reference voltage output signal.
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Citations
19 Claims
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1. A bias controller comprising:
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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 mode of operation of the device, the memory component including a mode setting input and a reference 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A bias controller comprising:
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a memory component storing a plurality of bias voltage settings, one for each mode of operation of the device, the memory component including a mode setting input and a bias voltage output signal; and
a potentiometer having a control configured to receive the bias voltage output signal and adjust a wiper position of the potentiometer to produce a control signal operable to adjust a bias of the bias controller.
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19. A bias controller comprising:
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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 and bias voltage settings, one of each for each mode of operation of the device;
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;
a bias voltage adjustment circuit adjusting the bias voltage applied to the device in accordance with the mode of the device; and
a controller having a mode selection input and operable to receive a mode selection and identify and associated bias and reference voltage setting and provide an adjustment signal to one or more of the reference and bias voltage adjustment circuits.
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Specification