Fast settling power amplifier regulator
First Claim
Patent Images
1. A circuit for regulating the output power of a power amplifier during a switching transient comprising:
- a detector circuit coupled to a 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;
a bias circuit coupled to the regulator for applying a signal to decrease the settling time of the regulator during a detected switching transient; and
a timer circuit coupled to the bias circuit and the detector circuit for controlling when the signal is applied to the regulator.
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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.
100 Citations
47 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 detector circuit coupled to a 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;
a bias circuit coupled to the regulator for applying a signal to decrease the settling time of the regulator during a detected switching transient; and
a timer circuit coupled to the bias circuit and the detector circuit for controlling when the signal is applied to the regulator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A circuit for regulating the output power of a power amplifier during a switching transient comprising:
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a regulator;
a detector for detecting a condition relating to the operation of the regulator;
control circuitry coupled to the regulator for decreasing the settling time of the regulator in response to a detected condition; and
a timer coupled to the detector and the control circuitry for controlling the duration that the control circuitry controls the output power of the regulator in response to a detected condition. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of controlling a regulator comprising the steps of:
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detecting a condition relating to the operation of the regulator;
in response to a detected condition, applying a signal to decrease the settling time of the regulator; and
applying the signal to the regulator for a predetermined amount of time. - View Dependent Claims (21, 22, 23, 24)
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25. A method of controlling a regulator used with a power amplifier comprising the steps of:
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providing first and second regulators for providing power to the power amplifier;
detecting a condition relating to the operation of the regulators;
in response to a detected condition, using any combination of the first and second regulators to provide power to the power amplifier. - View Dependent Claims (26, 27, 28, 29, 30, 31)
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32. A method of controlling a regulator for a power amplifier comprising the steps of:
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providing a regulator;
providing current to the regulator to power the power amplifier;
selectively applying a signal to the regulator to control the settling time of the regulator; and
providing a timer for controlling the duration of the applied control signal. - View Dependent Claims (33, 34, 35, 36, 37)
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38. A circuit for regulating the output power of a power amplifier during a switching transient comprising:
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a regulator;
a detector for detecting a condition relating to a power amplifier control signal;
control circuitry coupled to the regulator for controlling the settling time of the regulator in response to a detected condition; and
a timer coupled to the detector and the control circuitry for controlling the duration that the control circuitry controls the settling time of the regulator in response to a detected condition. - View Dependent Claims (39, 40, 41, 42)
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43. A circuit for regulating the output power of a power amplifier during a switching transient comprising:
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a detector circuit coupled to a 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;
a bias circuit coupled to the regulator for applying a signal to decrease the settling time of the regulator during a detected switching transient; and
a second regulator, wherein the circuit decreases the settling time of the regulator by selectively using the first and second regulators. - View Dependent Claims (44, 45)
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46. A circuit for regulating the output power of a power amplifier during a switching transient comprising:
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a regulator;
a detector for detecting a condition relating to the operation of the regulator;
control circuitry coupled to the regulator for decreasing the settling time of the regulator in response to a detected condition; and
switching circuitry for selectively activating two or more regulators in response to a detected condition. - View Dependent Claims (47)
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Specification