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:
Nov. 12, 1996
Filed:
Apr. 28, 1995
Ali E Zadeh, Sierra Madre, CA (US);
Wayne A Morgan, Granada Hills, CA (US);
Pacesetter, Inc., Sylmar, CA (US);
Abstract
An implantable stimulation device has a sensing amplifier circuit for amplifying low amplitude cardiac signals, while maintaining low power, to produce an output signal having a low noise level. The sense amplifier circuit includes a two-stage amplifier, a bandpass filter, and a threshold detector. The first stage comprises a linear differential amplifier which has low gain, good common mode rejection, and a current consumption proportional to the gain. The second stage is a switched-capacitor amplifier which has a programmable gain and low current consumption. The noise content of the system is low and produced substantially entirely in the switched-capacitor amplifier.