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:
Oct. 20, 1998
Filed:
May. 13, 1997
Michel S Michail, South Burlington, VT (US);
Wilbur David Pricer, Charlotte, CT (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A compound cascode amplifier comprising first and second FET input transistors, the gates of which are coupled to a differential input, and first and second FET cascode transistors. The sources of the first and second cascode transistors are coupled respectively to the drains of the first and second input transistors. The gate of the first cascode transistor is coupled to a reference voltage V Ref. The drain of the first cascode transistor is coupled to the gate of the second cascode transistor, and the drain of the second cascode transistor forms the output of the circuit. In operation the drive to the gate of the second cascode transistor arrives in synchronization with the drive to the source thereof, such that the drive to the gate arrives in anticipation of a voltage swing at the output of the second cascode transistor amplifier, not in reaction to it. Accordingly, this arrangement does not introduce a delay or an additional pole in the frequency response of the circuit. A more detailed embodiment of the compound cascode amplifier further includes first and second complementary FET input transistors, and first and second complementary FET cascode transistors.