Integrated circuit demodulator for FSK signals

Details Integrated circuit demodulator for FSK signals Integrated circuit demodulator for FSK signals

1981-06-02

1984-09-11

Grimm, Siegfried H.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

329110, 329126, 375 88, 375 96, H04L 2714

Patent

active

044713126

ABSTRACT:
An integrated circuit demodulator receives an alternating signal at a first frequency and an alternating signal at a second frequency and provides a binary output corresponding to the first and second frequencies. An input signal is received by a first and a second frequency filter. If the input signal is the first frequency, then it is attenuated in the second frequency filter and vice versa. A positive full wave rectifier receives the first frequency signal and provides a positive full wave rectification thereof. A negative full wave rectifier receives the second frequency signal and provides a negative full wave rectification thereof. The rectifications are summed in an operational amplifier, thereby providing a difference so that the positive rectification is reduced by the attenuated negative rectification and the negative rectification is reduced by the attenuated positive rectification. A binary output is thereby provided.

REFERENCES:
patent: 3683278 (1972-08-01), Ohnsorge et al.
patent: 3947769 (1976-03-01), Rousos et al.
Hosticka, B. J. et al., "MOS Sampled Data Recursive Filters Using Switched Capacitor Integrators", IEEE Journal of Solid State Circuits, vol. SC-12, No. 6, pp. 600-608, Dec. 1977 (not classified).
Martin, K. et al., "Strays-Insensitive Switched Capacitor Filters Based On Bilinear Z-Transform", Electronics Letters, vol. 15, No. 13, pp. 365-366, Jun. 21, 1979 (not classified).
Golyuka et al., Synchronous Detector with an Operational Amplifier, Instruments and Experimental Techniques, vol. 18, #2, pt. 2, pp. 500-501, Mar.-Apr. 1975 (pub. Sep. 1975) (329-126).

Affiliated with

Also associated with

Rating

Integrated circuit demodulator for FSK signals does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1197288