Switching circuit and method therefor

Details Switching circuit and method therefor Switching circuit and method therefor

2006-02-07

2006-02-07

Deberadinis, Robert L. (Department: 2836)

Electrical transmission or interconnection systems

Switching systems

C307S134000, C307S135000

Reexamination Certificate

active

06995482

ABSTRACT:
A method for providing a current path during switching transitions of a switching circuit while limiting the short circuit current. In one embodiment, a switching circuit includes a passive break-before-make element in series with two switches. An alternate embodiment includes a make-before-break element in parallel with the switches. The passive break-before-make element, or make-before-break element, provides a high impedance in a short term and a low impedance in a long term. The switching circuit may be coupled to a load through a low pass filter. In one embodiment, the switching circuit is used in a switching audio amplifier circuit, where correction of nonlinearities incorporates analog feedback to modify the duty ratio of a digitally generated switching signal in the analog domain.

REFERENCES:
patent: 5933453 (1999-08-01), Lewison
patent: 6414613 (2002-07-01), Midya et al.
patent: 6473457 (2002-10-01), Pascual et al.
patent: 6665338 (2003-12-01), Midya et al.
patent: WO 98/44626 (1998-10-01), None
patent: WO 99/59241 (1999-11-01), None
Mosely, I.D. et al; “Effect of dead time on harmonic distortion in class-D audio power amplifiers”; Electronic Letters; Jun. 10, 1999; pp 920-952; vol. 35, Issue 12; IEEE.
Nielsen, Karsten; “PEDEC—A Novel Pulse Referenced Control Method for High Quality Digital PWM Switching Power Amplification”; IEEE; 1998; pp 200-207; IEEE.
Midya, P. et al.; “Sensorless current mode control-an observer-based technique for DC—DC converters”; Power Electronics Specialists Conference, Jun. 22-27, 1997; pp 197-202; vol. 1; IEEE.
Kimball, J. et al; “Continuous-time optimization of gate timing for synchronous rectification”; IEEE 39thMidwest Symposium on Circuits and Systems; Aug. 18-21, 1996; pp 1015-1018; vol. 3; IEEE.

Affiliated with

Also associated with

Rating

Switching circuit and method therefor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Switching circuit and method therefor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Switching circuit and method therefor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3698205