Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Rectangular or pulse waveform width control
Patent
1992-09-30
1995-02-14
Stephan, Steven L.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Rectangular or pulse waveform width control
330251, 330 10, 327175, 327227, H03K 908
Patent
active
053898290
ABSTRACT:
An invention providing a hard limiter between the pulse width modulator and output drive transistors of a class-D amplifier is disclosed. The limiter functions by controlling the duty cycle of the pulse width modulator output, which directly corresponds to the magnitude of the voltage appearing across the load output transducer. The pulse width modulated (PWM) signal is compared to the outputs of a pair of one-shot circuits (single pulse generators). If either the positive pulse or the negative pulse of the PWM signal is shorter than the one-shot pulse, then the one-shot pulse is substituted for the PWM pulse. This sets the maximum and the minimum values for the duty cycle of the PWM signal, thereby limiting the positive and negative value of the corresponding output voltage.
REFERENCES:
patent: 3383546 (1968-05-01), Chopey
patent: 4689819 (1987-08-01), Killion
patent: 4754163 (1988-06-01), Aue et al.
patent: 5220203 (1993-06-01), McMorrow, Jr. et al.
patent: 5247581 (1993-09-01), Gurean
Exar Corporation
Riley Shawn
Stephan Steven L.
LandOfFree
Output limiter for class-D BICMOS hearing aid output 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 Output limiter for class-D BICMOS hearing aid output amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Output limiter for class-D BICMOS hearing aid output amplifier will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-289807