Norman F Reinhardt

US Patent:

54898773, Feb 6, 1996

Filed:

Oct 27, 1994

Appl. No.:

8/329419

Inventors:

Marc Yacoubian - Long Beach CA
Edward Rosen - Fountain Valley CA
Norman F. Reinhardt - Camarillo CA

Assignee:

Pico Products, Inc. - Lakeview Terrace CA

International Classification:

H03F 360

US Classification:

330286

Abstract:

A broadband amplifier includes an amplifier device and input and output networks formed of microstrips. The impedance of the output microstrip is chosen by taking the geometric mean of the real parts of one of the scattering parameters of the amplifier device, at the lower and upper limits of the frequency range of interest, and by taking the geometric mean of the system impedance with the result obtained previously. The final result of these calculations is the impedance of the output network. The impedance of the input network is made to be at least twice, and preferably twice, the impedance of the output network. The amplifier is also provided with a slope compensation circuit. It has been discovered that an amplifier designed in this manner exhibits remarkable flatness over a five-octave range. The amplifier circuit is therefore suitable for use in cable television and other broadband telecommunications applications, where the frequency range of interest may be 30 MHz to 1000 MHz.

US Patent:

56569734, Aug 12, 1997

Filed:

Oct 26, 1995

Appl. No.:

8/548944

Inventors:

Marc Yacoubian - Long Beach CA
Edward Rosen - Fountain Valley CA
Norman F. Reinhardt - Camarillo CA

Assignee:

Pico Products, Inc. - Lakeview Terrace CA

International Classification:

H03F 360

US Classification:

330286

Abstract:

A broadband amplifier includes an amplifier device and input and output networks formed of microstrips. The impedance of the output microstrip is chosen by taking the geometric mean of the real parts of one of the scattering parameters of the amplifier device, at the lower and upper limits of the frequency range of interest, and by taking the geometric mean of the system impedance with the result obtained previously. The final result of these calculations is the impedance of the output network. The impedance of the input network is made to be at least twice, and preferably twice, the impedance of the output network. The amplifier is also provided with a slope compensation circuit. It has been discovered that an amplifier designed in this manner exhibits remarkable flatness over a five-octave range. The amplifier circuit is therefore suitable for use in cable television and other broadband telecommunications applications, where the frequency range of interest may be 30 MHz to 1000 MHz.