Accession Number : ADD000044

Title :   Synchronous Detection System.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Caplan,Lawrence C ; Stern,Richard

Report Date : 09 Oct 1973

Pagination or Media Count : 12

Abstract : A principal object of the patent is to provide a relatively inexpensive lock-in amplifier system capable of measuring a periodic signal under adverse signal to noise conditions. Another object is to provide in a unitary, self-contained package, a wide-band system having an operating frequency range up to about 5MHz. A further object is to provide a system having a noise-rejection capability permitting, for example, easy selection of a signal about 80dB below white noise with approximately 1-2KHz bandwidth.

Descriptors :   *Demodulators, *Patents, Detection, Synchronism, Amplifiers

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE