Coherent noise cancelling filter

Details Coherent noise cancelling filter Coherent noise cancelling filter

1980-07-10

1982-08-10

Malzahn, David H.

Boots, shoes, and leggings

G06F 1531

Patent

active

043441505

ABSTRACT:
Apparatus and method for removing coherent noise from an electrical signal, such as powerline noise, and operating in real time. An operational amplifier with digital filter and a low pass filter in the feedback loop, with the digital filter providing a feedback signal corresponding to the coherent noise in the absence of the desired signal. In the preferred embodiment, an integrating type digital filter with digital memory, and alternative embodiments with condenser memory.

REFERENCES:
patent: 3614626 (1971-10-01), Dillard
patent: 3780279 (1973-12-01), Stover
patent: 3894219 (1975-07-01), Weigel
Harden, "Digital Filters With IC's Boost Q Without Inductors", Electronics, Jul. 24, 1967, pp. 91-100.
Visel, "Narrowband Digital Filter Achieves High Q's", Electronics, Nov. 22, 1973, p. 118.

Affiliated with

Also associated with

Rating

Coherent noise cancelling filter does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Coherent noise cancelling filter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coherent noise cancelling filter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1534441