Power amplifier protection circuit
First Claim
Patent Images
1. A power amplifier circuit comprising:
- a power amplifier;
a sensing circuit adapted to detect voltage peaks emitted by said power amplifier; and
a processing circuit receiving an input from said sense circuit and damping said power amplifier to reduce said voltage peaks.
4 Assignments
0 Petitions
Accused Products
Abstract
A power amplifier circuit comprises a sensing circuit and a processing circuit adapted to detect voltage peaks in an output of a power amplifier. If the voltage peak is above a predetermined threshold level, the processing circuit acts to reduce bias provided to the power amplifier, thereby reducing the output levels.
-
Citations
16 Claims
-
1. A power amplifier circuit comprising:
-
a power amplifier;
a sensing circuit adapted to detect voltage peaks emitted by said power amplifier; and
a processing circuit receiving an input from said sense circuit and damping said power amplifier to reduce said voltage peaks. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A method of controlling a power amplifier comprising:
-
sensing an output of said power amplifier with a sensing circuit; and
reducing bias supplied to said power amplifier to reduce said output when said output exceeds a predetermined threshold. - View Dependent Claims (9, 10, 11, 12, 13, 14)
-
-
15. A power amplifier circuit comprising:
-
a power amplifier comprising an input and an output;
a sensing circuit coupled to said output and detecting peaks in said output, said sensing circuit generating a control signal when a peak is detected; and
a processing circuit receiving said control signal and adjusting a bias signal supplied to said power amplifier to reduce peaks in said output.
-
-
16. A power amplifier circuit comprising:
-
a power amplifier comprising an input and an output;
a transistor coupled to said output and sensing voltage peaks in said output; and
a current mirror coupled to said transistor and said input, said current mirror adjusting bias supplied to said input based on voltage peaks detected by said transistor.
-
Specification