Amplifiers – Modulator-demodulator-type amplifier
Reexamination Certificate
2007-04-12
2009-02-17
Nguyen, Patricia (Department: 2817)
Amplifiers
Modulator-demodulator-type amplifier
C330S20700P, C330S075000
Reexamination Certificate
active
07492219
ABSTRACT:
An amplifier generates a tri-level output signal in response to an input signal that is pulse-width modulated. The amplifier is filterless and DC free. The amplifier includes an integrator, a signal generator, comparator, a switch pulse logic block, a driver, and a control block. The control block supplies a multitude of pulse-width modulated (PWM) signals in response to the received digital input signal. A pair of the PWM signals are applied to the signal generator which in response supplies a signal to the integrator. The integrator's output signal is compared to a reference signal by the comparator. The switch pulse logic block receives the output of the comparator and a pair of delayed PWM signals and in response generates a multitude of driver signals applied to the driver. The driver supplies an output signal that is adapted to vary between first, second and third voltages.
REFERENCES:
patent: 6211728 (2001-04-01), Chen et al.
patent: 6518838 (2003-02-01), Risbo
patent: 6594309 (2003-07-01), Botti et al.
patent: 6614297 (2003-09-01), Score et al.
patent: 6847257 (2005-01-01), Edwards et al.
patent: 6922100 (2005-07-01), Midya et al.
patent: 7135922 (2006-11-01), Zepp
patent: 7262658 (2007-08-01), Ramaswamy et al.
patent: 7286008 (2007-10-01), Watts
patent: 7312654 (2007-12-01), Roeckner et al.
patent: 7339425 (2008-03-01), Yang
Nielsen, K., “PEDEC—A Novel Pulse Referenced Control Method for High Quality Digital PWM Switching Power Amplification”,IEEE, 1998, pp. 200-207.
Marvell International Ltd.
Nguyen Patricia
LandOfFree
Power efficient amplifier does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Power efficient amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power efficient amplifier will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4136052