NDLI: Switched-capacitor FSK modulator and demodulator in CMOS technology

Content Provider	IEEE Xplore Digital Library
Author	Hosticka, B.J. Brockherde, W. Kleine, U. Zimmer, G.
Copyright Year	1966
Description	A switched-capacitor FSK modulator/demodulator built in silicon-gate CMOS technology is described. The modulator is based on a programmable harmonic oscillator using two stray-insensitive integrators. The centerpiece of the FSK demodulator is a switched-capacitor voltage-controlled oscillator. A simple post-detection processor restores the digital data. Both circuits have been designed for the 600-baud modem channel with 1500 Hz center frequency and /spl plusmn/200 Hz frequency shifts, but the demodulator operates in the 1200-baud channel as well. Due to dynamic biasing the operational amplifiers feature high slew rate, high voltage gain, and low power for capacitive loads.
Sponsorship	IEEE Solid-State Circuits Society IEEE Electron Devices Society IEEE Circuits and Systems Society Japan Society of Applied Physics (JSAP) IEEE Microwave Theory and Techniques Society IEEE San Francisco Section Bay Area Council Univ. PA IEEE
Starting Page	389
Ending Page	396
Page Count	8
File Size	1338177
File Format	PDF
ISSN	00189200
Volume Number	19
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1984-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	CMOS technology Frequency shift keying Demodulation Voltage-controlled oscillators Modulation coding Circuits Modems High power amplifiers Operational amplifiers Low voltage
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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