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:
Jun. 09, 1992
Filed:
Dec. 21, 1990
Baker P Scott, III, Austin, TX (US);
Eric J Swanson, Buda, TX (US);
Crystal Semiconductor Corporation, Austin, TX (US);
Abstract
An amplifier with controlled output impedance has a first output connected to the inverting input of the amplifier, and a second output, which forms the output of the amplifier, connected through a feedback conductance to the inverting input of the amplifier. A input conductance is connected from the inverting input to ground, and the input signal is connected to the positive input of the amplifier. The first and second outputs are provided by first and second current output stages. The currents provided by the first and second output stages are proportional to each other by a predetermined ratio. By proper selection of this predetermined ratio and the feedback and input conductances the desired output impedance and overall gain of the amplifier into a given load can be achieved.