Amplifiers – Hum or noise or distortion bucking introduced into signal...
Patent
1990-12-17
1992-04-14
LaRoche, Eugene R.
Amplifiers
Hum or noise or distortion bucking introduced into signal...
328162, H03F 126
Patent
active
051051656
ABSTRACT:
A bipolar or field-effect transistor amplifier with very large dynamic range for use as a preamplifier in a radio receiver, optical link reciver, or the like. The amount of gain is approximately an integral number. Diode-connected transistors in the collector load circuitry of a gain-providing transistor cancel the distortion from the non-linear effects of the emitter-base junction of the gain-providing transistor at high input signal levels. The number of diodes corresponds to the amount of gain desired. To reduce the noise generated by the amplifier, the emitter of the gain-providing transistor has an inductor in series therewith and the collector load circuitry has an inductor therein, the ratio of the inductances substantially determining the gain of the amplifier.
REFERENCES:
patent: 3813559 (1974-05-01), De Boer
patent: 4481483 (1984-11-01), Kawamura
"Radio Receiving Principles", The 1987 ARRL Handbook for the Radio Amateur, 1987, Chapter 12, pp. 12-12 through 12-15.
"The RF Amplifier", Solid State Radio Engineering, Herbert L. Krauss and Charles W. Bostian and Frederick H. Raab, Copyright 1980 by John Wiley & Sons, Inc., pp. 268 through 269.
"Analog Multipliers Employing the Bipolar Transistor, Nonlinear Analog Circuits", Analysis and Design of Analog Integrated Circuits, Second Edition, Paul R. Gray, Robert G. Meyer, Copyright 1977, 1984 by John Wiley & Sons, Inc., pp. 595 through 600.
AT&T Bell Laboratories
Dinh Tan
LaRoche Eugene R.
McLellan S. W.
LandOfFree
Low distortion, low noise, 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 Low distortion, low noise, amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low distortion, low noise, amplifier will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2352302