Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Synthesizer
Patent
1994-02-15
1996-09-10
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Synthesizer
327107, 327231, 327237, 327238, 327266, 327274, H03K 513
Patent
active
055549454
ABSTRACT:
A voltage-controlled phase shift apparatus having an unlimited range for producing an output signal that varies in phase from an input signal by a predetermined phase difference. The phase shift apparatus includes a first delay circuit coupled to receive the input signal, the first delay circuit for outputting a first intermediate signal that is .alpha. degrees out of phase with the input signal, a second intermediate signal that is .beta. degrees out of phase with the first intermediate signal, a third intermediate signal that is 180 degrees out of phase with the first intermediate signal, and a fourth intermediate signal that is 180 degrees out of phase with the second intermediate signal. The phase shift apparatus also includes a phase interpolator circuit coupled to receive a control voltage signal and the first, second, third and fourth intermediate signals, the phase interpolator for phase mixing a selected pair of the first, second, third and fourth intermediate signals in response to the control voltage signal, the phase interpolator for outputting the output signal. A phase selector circuit coupled to the phase interpolator circuit and coupled to receive a phase slope signal and the control voltage signal selects the selected pair in response to the phase slope signal and the control voltage signal such that the output signal varies in phase from the input signal by the predetermined phase difference.
REFERENCES:
patent: 3296517 (1967-01-01), Routh et al.
patent: 3546604 (1970-12-01), White et al.
patent: 3555458 (1971-01-01), Fombonnie
patent: 3911368 (1975-10-01), Tarczy-Hornoch
patent: 3997772 (1976-12-01), Crochiere et al.
patent: 4156851 (1979-05-01), Winters
patent: 4638190 (1987-01-01), Hwang et al.
patent: 4739279 (1988-04-01), Pion
patent: 4806888 (1989-02-01), Salvage et al.
patent: 4866397 (1989-09-01), Kimyacioglu
patent: 4994773 (1991-02-01), Chen et al.
patent: 5015872 (1991-05-01), Rein
patent: 5157276 (1992-10-01), Metz
patent: 5317288 (1994-05-01), Yung et al.
PCT Search Report dated May 24, 1995, 6 pages.
Donnelly Kevin S.
Ho Tsyr-Chyang
Lee Thomas H.
Callahan Timothy P.
Lam T.
Rambus Inc.
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