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:
Apr. 22, 2003
Filed:
Sep. 27, 2001
Thomas Clark Bryan, Rancho Santa Fe, CA (US);
Harry Huy Dang, San Diego, CA (US);
Applied Micro Circuits Corporation, San Diego, CA (US);
Abstract
A source follower circuit for low voltage differential signaling (LVDS) has a low power consumption, low noise, and the ability to drive a highly capacitive load at an output port of an integrated circuit (IC). The source follower circuit includes a first p-channel transistor having a drain coupled to a supply voltage and a gate coupled to a first input; a second p-channel transistor having a drain coupled to the supply voltage and a gate coupled to a second input which is complementary to the first input; a third p-channel transistor having a gate coupled to the second input, a source coupled to ground, and a drain coupled to a source of the first p-channel transistor which forms a first output; and a fourth p-channel transistor having a source coupled to the ground and a drain coupled to a source of the second p-channel transistor which forms a second output which is complementary to the first output. Advantageously, the output signals of the circuit are referenced to ground and are less affected by power supply variations.