The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 15, 1997
Filed:
Nov. 14, 1994
Wayne Kennan, Palo Alto, CA (US);
Fujitsu Limited, Kawasaki, JP;
Abstract
A monolithic microwave integrated circuit (MMIC) downconverter for a direct broadcast satellite low noise block downconverter is comprised of a mixer that produces sum and difference frequency signals from an oscillator signal and a radio frequency (RF) signal. An intermediate frequency (IF) signal is obtained by selecting the difference signal of the sum and difference frequency signals using a low pass filter. An active load and amplifier circuit coupled to the low pass filter both provides a DC bias voltage to the mixer that is substantially insensitive to DC current and amplifies the IF signal from the low pass filter. The combined active load and amplifier circuit conserves DC power and reduces the MMiC circuit size, thus reducing the Gallium Arsenide area and therefore, the component cost.