Monolithically integratable phase shifter VCO

Details Monolithically integratable phase shifter VCO Monolithically integratable phase shifter VCO

1988-11-14

1989-11-07

Grimm, Siegfried H.

Oscillators

Polyphase output

331 57, 331108B, 331135, 331177R, H03B 524, H03B 2700

Patent

active

048795305

ABSTRACT:
A phase shifter VCO has at least first and last fundamental circuits each including an amplifier adding circuit, a control input connected to all of the other control inputs for a tuning potential varying an amplification operative ratio between the first input and the output to the second input and the output of the adding circuit, a reference input for a reference potential, symmetrical first and second non-inverting and inverting circuit input pairs, a symmetrical non-inverting and inverting circuit output pair, and a symmetrical timing element having an input connected to the first circuit input and having an output forming the first input of the adding circuit. The first non-inverting input of the first fundamental circuit is connected to the non-inverting output of the last fundamental circuit, and the first inverting input of the first fundamental circuit is connected to the inverting output of the last fundamental circuit. The non-inverting output of the first fundamental circuit is connected to the first inverting input of the last fundamental circuit and to the second inverting inputs of all of the fundamental circuits, and the inverting signal output of the first fundamental circuit is connected to the first non-inverting input of the last fundamental circuit and to the second non-inverting inputs of all of the fundamental circuits. At least one of the signal outputs of at least one of the fundamental circuits forms a signal output of the phase shifter oscillator.

REFERENCES:
patent: 3452289 (1969-06-01), Ryan
patent: 3708757 (1973-01-01), Savarese et al.
patent: 4758740 (1988-07-01), Wilhelm et al.
IEEE Journal of Solid State Circuits, Feb. 1970, pp. 45-48, New York, U.S.: C. R. Ryan: "Applications of a Four-Quadrant Multiplier", Figures 1 and 2; p. 46, lines 10-21.
German Brochure: "Halbleiter-Schaltungstechnik", Tietzel/Schenk: Springer-Verlag, Berlin, Heidelberg, New York, Tokyo 1985, pp. 335-340.
German Brochure: "Theorie und Entwurf Elektrischer Netzwerke", (Stewart): Berliner Union, Stuttgart 1958; pp. 372-395.
IBM Technical Disclosure Bulletin, vol. 16, No. 11, Apr. 1974, pp. 3498-3500, New York, U.S.; Marino: "Variable Delay Pulse Circuits"; Figure 2, p. 3499, Last Paragraph.

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