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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.:

US 9154170 B1

PDFFull Text
Date of Patent:
Oct. 06, 2015

Filed:

Feb. 13, 2015

Tia-to-adc interface with low-noise and a wide-range of passive gain control

Applicant:

Broadcom Corporation, Irvine, CA (US);

Inventors:

Mohyee Mikhemar, Aliso Viejo, CA (US);

Amir Hadji-Abdolhamid, Aliso Viejo, CA (US);

Hooman Darabi, Laguna Niguel, CA (US);

Assignee:

BROADCOM CORPORATION, Irvine, CA (US);

Attorney:

McDermott Will & Emery LLP

Primary Examiner:

Ajibola Akinyemi

Int. Cl.
CPC ...
H04B 1/06 (2006.01); H04B 1/12 (2006.01); H04B 1/18 (2006.01); H03F 1/22 (2006.01); H03F 3/195 (2006.01); H03F 3/45 (2006.01); H03G 3/00 (2006.01); H03F 3/19 (2006.01); H03G 3/18 (2006.01); H03H 7/01 (2006.01); H03H 7/06 (2006.01);
U.S. Cl.
CPC ...
H04B 1/123 (2013.01); H03F 1/223 (2013.01); H03F 3/19 (2013.01); H03F 3/195 (2013.01); H03F 3/45179 (2013.01); H03F 3/45475 (2013.01); H03G 3/00 (2013.01); H03G 3/18 (2013.01); H03H 7/0138 (2013.01); H03H 7/06 (2013.01); H03H 7/17 (2013.01); H04B 1/18 (2013.01); H03F 2200/165 (2013.01); H03F 2200/294 (2013.01); H03F 2200/336 (2013.01); H03F 2200/451 (2013.01); H03F 2203/45394 (2013.01); H03F 2203/45512 (2013.01); H03F 2203/45528 (2013.01); H03F 2203/45631 (2013.01); H03F 2203/45686 (2013.01); H03F 2203/45702 (2013.01);
Abstract

A circuit for a low-noise interface between an amplifier and an analog-to-digital converter (ADC) may comprise a capacitor element having a capacitance of C coupled between a first and second output node of the amplifier. A resistor circuit coupled between the capacitor element and input nodes of the ADC. A desired value Rfor a load resistance of the amplifier is provided by selecting suitable initial values for resistances of the resistor circuit. A desired bandwidth for the at least one amplifier is achieved by selecting a value of the capacitance C based on the desired value Rfor the load resistance.

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