Meter pulse filtering circuit for analog modems

Details Meter pulse filtering circuit for analog modems Meter pulse filtering circuit for analog modems

2005-01-11

2005-01-11

Kuntz, Curtis (Department: 2643)

Telephonic communications

Substation or terminal circuitry

Sidetone control or hybrid circuit

C379S391000, C379S114010, C379S361000, C379S386000, C379S390020, C379S402000

Reexamination Certificate

active

06842517

ABSTRACT:
A filtering circuit is described for filtering out meter pulses of analog telephone communication, for example in analog modems. The circuit is mainly composed of resistors and capacitors and is configured as a double T element or a Wien bridge circuit. The filtering circuit is needed for attenuating interferences to such an extent that integrated circuits operating with low voltages are not overloaded.

REFERENCES:
patent: 3174111 (1965-03-01), Grover
patent: 3729687 (1973-04-01), Orlandini et al.
patent: 4701947 (1987-10-01), Stader
patent: 5497417 (1996-03-01), Brahms et al.
patent: 0 608 182 (1994-07-01), None
Didier Haspeslagh et al.: “A Four-Channel Digital Signal Processor in 1.2-μm CMOS with On-Chip D/A and A/D Conversion Serving Four Speech Channels in a New Generation Subscriber Line Circuit”, IEEE Journal of Solid-State Circuits, vol. 26, Jul. 1991, No. 7, pp. 1038-1045.

Affiliated with

Also associated with

Rating

Meter pulse filtering circuit for analog modems does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Meter pulse filtering circuit for analog modems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Meter pulse filtering circuit for analog modems will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3389709