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. 17, 2023
Filed:
Sep. 20, 2022
Ambarella International Lp, Santa Clara, CA (US);
Yueh Chun Cheng, Cupertino, CA (US);
Ambarella International LP, Santa Clara, CA (US);
Abstract
An apparatus comprises a cross-coupled differential amplifier, an inductive-capacitive (LC) tank circuit, and a low-noise voltage supply. The inductive-capacitive (LC) tank circuit is generally coupled in a feedback path of the cross-coupled differential amplifier. The LC tank circuit generally comprises (i) an inductance provided by an inductor, (ii) a first capacitance provided by a parallel coupled varactor circuit, (iii) a second capacitance provided by a parallel coupled first switched-capacitor bank, and (iv) a third capacitance provided by a parallel coupled second switched-capacitor bank. The low-noise voltage supply may be configured to provide a supply voltage of the cross-coupled differential amplifier. The parallel coupled varactor circuit comprises a pair of thick oxide varactors connected with a reverse varactor connection. The parallel coupled first switched-capacitor bank and the parallel coupled second switched-capacitor bank comprise thin oxide switches.