Saturation protection of a regulated voltage
AssigneeSkyworks Solutions, Inc.
InventorLige Wang
Life of this patent
Estimating the term…
Abstract
A system for preventing power amplifier supply voltage saturation includes a multiple stage voltage regulator configured to provide a regulated voltage, a power amplifier configured to receive the regulated voltage, and a saturation protection circuit configured to apply a current into a first stage of the multiple stage voltage regulator when the regulated voltage reaches a reference voltage, the applied current causing a subsequent stage of the multiple stage voltage regulator to prevent the regulated voltage from exceeding the reference voltage.
Claims20
A system for regulating voltage, the system comprising:
- a saturation protection circuit configured to receive a regulated voltage and a reference voltage and generate an offset signal based on a comparison of the regulated voltage with the reference voltage;
- and
- a voltage regulator including a comparator having at least a first stage and a subsequent stage, the voltage regulator configured to generate the regulated voltage, receive the offset signal from the saturation protection circuit in the first stage of the comparator, and cause the subsequent stage of the comparator to prevent the regulated voltage from exceeding the reference voltage based on the offset signal.
A method for preventing voltage saturation, the method comprising:
- generating a regulated voltage using a voltage regulator;
- comparing a reference voltage with the regulated voltage;
- and
- applying a current to the voltage regulator when the reference voltage is approximately equal to the regulated voltage so as to cause the voltage regulator to prevent the regulated voltage from exceeding a set threshold.
A portable communication device comprising:
- a power amplifier configured to generate a radio frequency (RF) signal;
- a power amplifier controller configured to receive a reference voltage, generate a regulated voltage, apply an offset signal based on the regulated voltage and the reference voltage, and prevent the regulated voltage from exceeding a set threshold based on the offset signal;
- and
- an antenna configured to transmit the RF signal.
A system for regulating voltage, the system comprising:
- a saturation protection circuit configured to receive a regulated voltage and a reference voltage and apply a signal when the regulated voltage approaches the reference voltage;
- and
- a voltage regulator configured to generate the regulated voltage, receive the applied signal from the saturation protection circuit, and prevent the regulated voltage from exceeding a set threshold based on the applied signal.
Dependencies are inferred from the claim text.