Patent ID: 8823457
Filing Date: 2014-09-02
Classification: H03F

Abstract:
1. One or more circuits that provide short circuit protection, comprising: first circuitry that receives an output signal from a power amplifier to be protected from a short-circuit event, the first circuitry mirroring an output stage of the power amplifier and providing a mirrored current that mirrors an output stage current of the power amplifier; and second circuitry operatively coupled to the first circuitry and to the power amplifier, the second circuitry including a comparator circuit that compares the mirrored current to a reference current, wherein a first transistor of the comparator circuit is in a mirror configuration with respect to a second transistor of the power amplifier, and wherein the second transistor sinks or sources current into the power amplifier to protect the power amplifier from the short-circuit event.