Apparatus and method for reduced sample rate class S RF...

Amplifiers – Modulator-demodulator-type amplifier

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C375S238000

Reexamination Certificate

active

11327838

ABSTRACT:
A Class S RF power amplifier for use in a radio frequency (RF) transmitter. The Class S power amplifier comprises a delta-sigma modulator that receives an analog modulated RF carrier and generates a pulse-width modulated binary signal. The Class S power amplifier also comprises a switch mode power amplifier that receives the pulse-width modulated binary signal generated by the delta-sigma modulator and generates an output carrier signal that switches between a fully on state and a fully off state. The sampling rate of the delta-sigma modulator is less than four times the frequency of the output carrier signal generated by the switch mode power amplifier.

REFERENCES:
patent: 4028633 (1977-06-01), Rogers et al.
patent: 5392039 (1995-02-01), Thurston
patent: 6882219 (2005-04-01), Leedham
patent: 7081793 (2006-07-01), Morris et al.
patent: 2002/0097085 (2002-07-01), Stapleton
patent: 2004/0047477 (2004-03-01), Bank et al.
patent: 2005/0179487 (2005-08-01), Lee et al.
patent: 2006/0094376 (2006-05-01), Lee et al.
Yunfeng Liang et al., “A 250MHz CMOS Bandpass Delta Sigma Modulator Using Continuous-Time Resonator Structure (Short Paper)”, 4 pages.
Issac Hsu et al., “A 70-MHz Continuous-time CMOS Band-pass ΣΔ Modulator for GSM Receivers”, ISCAS 2000-IEEE International Symposium on Circuits and Systems, May 28-31, 2000, pp. III-750-III-753.
Arun Jayaraman et al., “Bandpass Delta-Sigma Modulator with 800 MHz Center Frequency”, 1997 IEEE, pp. 95-98.
J. F. Jensen et al., “A 3.2-Ghz Second-Order Delta-Sigma Modulator Implemented in InP HBT Technology”, IEEE Journal of Solid-State Circuits, vol. 30, No. 10, Oct. 1995, pp. 1119-1127.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Apparatus and method for reduced sample rate class S RF... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus and method for reduced sample rate class S RF..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for reduced sample rate class S RF... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3940033

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.