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:
Mar. 21, 2017
Filed:
Jan. 20, 2015
Applicant:
Dsp Group Ltd., Herzeliya, IL;
Inventor:
Moshe Haiut, Ramat Gan, IL;
Assignee:
DSP GROUP LTD., Herzliya, IL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 99/00 (2009.01); H04R 3/00 (2006.01); H04R 1/04 (2006.01);
U.S. Cl.
CPC ...
H04R 3/00 (2013.01); H04R 1/04 (2013.01); H04R 2201/003 (2013.01);
Abstract
A scheme is described to switch the power supply to the MEMS microphone on and off in a cyclic manner that is synchronized with the associated ADC sampling rate. In this way the MEMS microphone amplifier, whether it is a J-FET transistor or an operational amplifier, is off most of the cycle time, and is turned on only for a few micro-seconds prior to the sample-and-hold timing of the ADC device. By this method, the average power consumption of an existing analog MEMS microphone can be reduced by a factor of 10 or more.