FSK data waveform shaping circuit

Details FSK data waveform shaping circuit FSK data waveform shaping circuit

1990-07-16

1991-11-26

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307359, 328164, H04L 2714

Patent

active

050685449

ABSTRACT:
A FSK data signal voltage inputted from an input terminal 4 is converted into current by a resistance R.sub.1 and then the current is differentially amplified with respect to a reference voltage of a capacitor C.sub.1 in a second differential amplifier circuit 2. As a result, a waveform-shaped signal is generated from each collector of transistors Q.sub.2 and Q.sub.3 constituting the second differential amplifier circuit 2. Meanwhile, the FSK data signal inputted from the input terminal 4, after an alternating current signal component thereof is removed, is applied to a third differential amplifier circuit 3 wherein a difference between the signal and the reference voltage of the capacitor C.sub.1 is amplified. Charging/discharging the capacitor C.sub.1 is controlled in response to an output of the third differential amplifier circuit 3.

REFERENCES:
patent: 4612509 (1986-09-01), Betts et al.
patent: 5015961 (1991-05-01), Springer et al.

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