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US 6,747,516 B2Granted
Power controller circuit for a power amplifier stage
AssigneeAnalog Devices, Inc.
InventorsShuyun Zhang, Robert Jeffery McMorrow
Life of this patent
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Abstract
A power controller circuit for a power amplifier stage includes an exponential power control circuit responsive to a power control signal for providing an exponential control current to control power amplifier stage and linear power control circuit responsive to the power control signal for supplementing the exponential control current to the power amplifier stage with a linear control current to produce a composite control current with a reduced and extended slope.
Claims22
A power controller circuit for a power amplifier stage comprising:
- an exponential power control circuit responsive to a power control signal for providing an exponential control current to control the power amplifier stage;
- and
- a linear power control circuit responsive to said power control signal for supplementing said exponential control current to said power amplifier stage with a linear control current to produce a composite control current with a reduced and extended slope.
A power controller system for a multistage power amplifier comprising:
- a power controller circuit system associated with at least one of the stages and including:
- an exponential power control circuit responsive to a power control signal for providing an exponential control current to control the power amplifier stage;
- and
- a linear power control circuit responsive to said power control signal for supplementing said exponential control current to said power amplifier stage with a linear control current to produce a composite control current with a reduced and extended slope.
1 more element
Dependencies are inferred from the claim text.