Multi-stage output buffer

Details Multi-stage output buffer Multi-stage output buffer

2007-02-13

2007-02-13

Pascal, Robert (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S261000

Reexamination Certificate

active

10934164

ABSTRACT:
A multi-stage output buffer is disclosed. The output buffer includes an emitter follower circuit coupled to a differential input that is configured to provide a substantially high input impedance at an input thereof, and provide a substantially low output impedance at an output thereof. An emitter coupled pair circuit is coupled to the output of the emitter follower circuit, and is configured to amplify the signal and further isolate an input circuit. The buffer further includes a base-grounded configuration transistor circuit coupled to an output of the emitter coupled pair circuit and having an output coupled to the differential output of the multi-stage output buffer. The base-grounded transistor circuit reduces a load impedance at the output of the emitter coupled pair circuit, improves decoupling of the external load from an input circuit when coupled thereto, and increases the output power.

REFERENCES:
patent: 5254956 (1993-10-01), Nishijima
patent: 5815034 (1998-09-01), Takahashi
patent: 6275110 (2001-08-01), Kung
patent: 6731182 (2004-05-01), Sakurai
patent: 6750727 (2004-06-01), Sutardja
patent: 2004/0108908 (2004-06-01), Lazarescu et al.
patent: 2005/0104661 (2005-05-01), Rokugawa et al.
patent: 617735 (1978-07-01), None
“40Gbit/s transimpedance amplifier in SiGe bipolar technology for the receiver in optical-fibre TDM links”, J. Müllrich. T.F. Meister, M. Rest, W. Bogner, A Schöpflin and H-M. Rein, Electronics Letters, 5thMar. 1998, vol. 34, No. 5, 2 pgs.
“Wafer Level Integration of a 24 GHz and 34 GHz Differential SiGe-MMIC Oscillator with a Loop Antenna on a BCB Membrane”, P. Abele, J. Konle, D. Behammer, E. Sömmez, K.-B. Schad, A. Trasser and H. Schumacher, 2003 IEEE MTT-S Digest, pp. 1033-1036.
“Single-Chip 20-GHz VCO and Frequency Divider in SiGe Technology”, K. Ettinger, A. Stelzer, C. G. Diskus, W. Thomann, J. Fenk and R. Weigel. 2002 IEEE MTT-S Digest, pp. 835-838.
“Millimeter-Wave VCOs With Wide Tuning Range and Low Phase Noise, Fully Integrated in a SiGe Bipolar Production Technology”, Hao Li and Hans-Martin Rein, IEEE Journal of Solid-State Circuits, vol. 38, No. 2, Feb. 2003, pp. 184-191.
“47 GHz VCO With Low Phase Noise Fabricated in a SiGe Bipolar Production Technology”, H. Li, H.-M. Rein, R. Kreienkamp and W. Klein, IEEE Microwave and Wireless Components Letters, vol. 11, No. 3, Mar. 2002, pp. 79-81.

Affiliated with

Also associated with

Rating

Multi-stage output buffer 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-stage output buffer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-stage output buffer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3846596