Fast settling power amplifier regulator
First Claim
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1. A circuit for regulating the output power of a power amplifier during a switching transient comprising:
- a regulator for providing regulated power to the power amplifier;
a detector circuit coupled to the regulator and to a control signal that is generated to control the output power of the power amplifier, wherein the detector circuit detects switching transients of the power amplifier; and
a bias control circuit coupled to the regulator for applying a bias signal to the regulator to decrease the settling time of the regulator during the detected switching transients, wherein the regulator continues to provide regulated power to the power amplifier while the bias signal is applied.
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Abstract
A method and apparatus is provided for dynamically changing the biasing conditions of a voltage regulator to overcome the problems caused by various conditions. The invention includes a detector and a bias control circuit for applying bias current to the voltage regulator to compensate for a detected condition.
122 Citations
22 Claims
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1. A circuit for regulating the output power of a power amplifier during a switching transient comprising:
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a regulator for providing regulated power to the power amplifier; a detector circuit coupled to the regulator and to a control signal that is generated to control the output power of the power amplifier, wherein the detector circuit detects switching transients of the power amplifier; and a bias control circuit coupled to the regulator for applying a bias signal to the regulator to decrease the settling time of the regulator during the detected switching transients, wherein the regulator continues to provide regulated power to the power amplifier while the bias signal is applied. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A circuit for regulating the output power of a power amplifier during a switching transient comprising:
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a regulator for providing regulated power to the power amplifier; a detector for detecting a condition relating to the operation of the regulator; and control circuitry coupled to the regulator for applying a bias signal to the regulator to decrease the settling time of the regulator in response to the detected condition, wherein the regulator continues to provide regulated power to the power amplifier while the condition is detected. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of controlling a regulator for providing regulated power to a power amplifier, the method comprising:
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using the regulator to regulate the power provided to the power amplifier; detecting a condition relating to the operation of the regulator; and in response to a detected condition, applying a bias signal to the regulator for a limited duration to decrease the settling time of the regulator while continuing to provide regulated power to the power amplifier. - View Dependent Claims (19, 20, 21, 22)
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Specification