Control circuit and method for a switching amplifier

Details Control circuit and method for a switching amplifier Control circuit and method for a switching amplifier

2008-01-17

2009-06-09

Choe, Henry K (Department: 2817)

Amplifiers

Modulator-demodulator-type amplifier

C330S251000

Reexamination Certificate

active

07545207

ABSTRACT:
In a control circuit and method for a high efficiency and low EMI switching amplifier, an input signal is compared with a reference signal to generate a comparison signal, and a control signal is generated in response to the comparison signal for a driver to generate an output signal. The output signal is fed back to control the slope of the reference signal in association with an initial level set for the reference signal to provide a minimum on-time period for the output signal. Alternatively, a reference value is provided to compare with the reference signal for setting a minimum on-time period for the output signal.

REFERENCES:
patent: 6081075 (2000-06-01), Littlefield
patent: 6614297 (2003-09-01), Score et al.
patent: 6998815 (2006-02-01), Furuki
patent: 7076070 (2006-07-01), Pearce et al.
patent: 7298209 (2007-11-01), Sutardja

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