Linear ramp generator having two voltage controlled current sour

Details Linear ramp generator having two voltage controlled current sour Linear ramp generator having two voltage controlled current sour

1996-06-24

1997-06-24

Grimm, Siegfried H.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Generating sawtooth or triangular output

327133, 327134, 327137, 327140, H03K 408, H03K 490

Patent

active

056420668

ABSTRACT:
An ultra-linear chirp generator includes a voltage controlled oscillator (VCO) having a tuning characteristic which is naturally nonlinear, a linear ramp generator which generates a linearly ramping output signal having a linear slope characteristic with respect to time, a polynomial correction waveform generator which generates a polynomial correction signal, and a summer which is responsive to and sums the linearly ramping output signal and the polynomial correction signal. The summer generates a VCO tuning signal for tuning the VCO. The tuning signal corresponds to the linearly ramping output signal predistorted with a nonlinearity opposite to the natural nonlinearity of the VCO tuning characteristic. The linear chirp generator also includes a phase locked loop which is responsive to the output signal of the VCO and which has a reference frequency which is related to the repetition rate of the output signal of the VCO.

REFERENCES:
patent: 3530399 (1970-09-01), Goggins, Jr.
patent: 3699448 (1972-10-01), Martin et al.
patent: 3932741 (1976-01-01), Hanson
patent: 4245196 (1981-01-01), Peebles, Jr. et al.
patent: 4284906 (1981-08-01), Manfredi

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