Systems and methods for improved over-current clipping

Details Systems and methods for improved over-current clipping Systems and methods for improved over-current clipping

2008-12-30

2011-12-20

Tran, Minh-Loan T (Department: 2826)

Amplifiers

Modulator-demodulator-type amplifier

C330S298000, C381S055000, C381S120000

Reexamination Certificate

active

08081028

ABSTRACT:
Systems and methods for implementing over-current protection in amplifiers are provided, including systems, methods and devices for specifying a clip level at which to clip an audio signal in response to an over-current condition being detected. In an embodiment, the clip level is reduced while the over-current condition is being detected. Once the over-current condition is no longer detected, the clip level is maintained for a specified period before allowing the clip level to be increased. In an embodiment, the specified period, for which the clip level is maintained before the clip level is allowed to be increased, starts when the over-current condition is no longer detected, and ends when each of N immediately preceding sample(s) of the audio signal are not clipped to the clip level, where N is an integer, and N≧1. After an over-current condition is no longer detected, and after the clip level has been maintained for the specified period, the clip level can be increased if an over-current condition is not detected for a sample and the clip level is below a specified maximum clip level.

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