FSK decoder for caller ID

Details FSK decoder for caller ID FSK decoder for caller ID

2006-02-07

2006-02-07

Nguyen, Duc (Department: 2643)

Telephonic communications

Reception of calling information at substation in wireline...

C379S142040, C379S142180, C379S283000

Reexamination Certificate

active

06996218

ABSTRACT:
A device for processing a frequency shift keying (FSK) signal including caller ID information that comprises an analog-to-digital converter (ADC) converting the FSK signal into a digital FSK signal, the FSK signal further comprising a first frequency component, a second frequency component including the caller ID information, and a third frequency component, a first filter attenuating the first and third frequency components of the digital FSK signal to provide a first signal, a second filter attenuating the second frequency component of the digital FSK signal to provide a second signal, and a circuit calculating an energy level for each of the first and second signals, and selecting the first signal for output if the energy level of the first signal is smaller than that of the second signal, and selecting the digital FSK signal for output if the energy level of the first signal is greater than that of the second signal.

REFERENCES:
patent: 5970128 (1999-10-01), Kim
patent: 6160857 (2000-12-01), Yang
patent: 6265948 (2001-07-01), Stevenson
patent: 6480589 (2002-11-01), Lee et al.

Affiliated with

Also associated with

Rating

FSK decoder for caller ID does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with FSK decoder for caller ID, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and FSK decoder for caller ID will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3636512