Multi-reference high accuracy switching amplifier expansion

Details Multi-reference high accuracy switching amplifier expansion Multi-reference high accuracy switching amplifier expansion

2003-02-03

2004-07-27

Nguyen, Patricia (Department: 2817)

Amplifiers

Modulator-demodulator-type amplifier

C330S251000, C330S20700P

Reexamination Certificate

active

06768375

ABSTRACT:

FIELD OF THE INVENTION
The present invention resides in use of time domain multiplexing to effect the summation necessary for use of multiple references in a multi-reference amplifier.
BACKGROUND OF THE INVENTION
Multi-reference amplifiers improve resolution available to the load by the summation of multiple voltages which are individually modulated. My co-pending U.S. patent application Ser. No. 09/831,595 shows use of a bridged-tied load output to perform continuous load summation to this end. In some applications, however, cost or other factors preclude the use of a bridged output stage. A need exists for a simple, more cost-effective output stage capable of multi-reference operation.
SUMMARY OF THE INVENTION
The filtered output of multiple possible voltage levels are AC-coupled to a load. An incoming data stream provides input to a pulsewidth modulator which issues control voltages to three or more switching devices, respectively. A first switching device provides a controlled connection to the incoming power supply (V+), a second switching device provides a controlled connection to a lower reference voltage (VR), and a third switching device provides a controlled connection to common, or ground. The common connection of switching devices provides an input to an inductor, which, in conjunction with a capacitor removes out-of-band components before presentation of the output to one side of load. Another capacitor provides a pseudo-ground for the second side of load in a manner consistent with the art of AC-coupled power amplifiers.


REFERENCES:
patent: 4403197 (1983-09-01), Swanson
patent: 4404526 (1983-09-01), Kirn
patent: 4733342 (1988-03-01), Mueller et al.
patent: 4773096 (1988-09-01), Kirn
patent: 5113145 (1992-05-01), Ideler et al.
patent: 5309297 (1994-05-01), Funahashi
patent: 5311136 (1994-05-01), Takahashi
patent: 5398003 (1995-03-01), Heyl et al.
patent: 5559467 (1996-09-01), Smedley
patent: 5610553 (1997-03-01), Kirn
patent: 5613010 (1997-03-01), Heyl et al.
patent: 5617058 (1997-04-01), Adrian et al.
patent: 5777512 (1998-07-01), Tripathi et al.
patent: 5777519 (1998-07-01), Simopoulos
patent: 5886572 (1999-03-01), Myers et al.
patent: 5909153 (1999-06-01), Delano et al.
patent: 5909496 (1999-06-01), Kishigami et al.
patent: 5949282 (1999-09-01), Nguyen et al.
patent: 6150880 (2000-11-01), Schweighofer
patent: 6281767 (2001-08-01), Lastrucci
patent: 6441685 (2002-08-01), MacMillan
R. Erickson and R. Middlebrook; “Origins of Harmonic Distortion in Switching Amplifiers,” Proceedings of the Fourth Annual International PCI Conference, 1982, pp. 57-61.

Affiliated with

Also associated with

Rating

Multi-reference high accuracy switching amplifier expansion does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multi-reference high accuracy switching amplifier expansion, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-reference high accuracy switching amplifier expansion will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3213803