Ramp generator

Details Ramp generator Ramp generator

1995-01-05

1995-12-19

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Generating sawtooth or triangular output

327135, 327137, 327336, 327345, H03K 406, G06G 764

Patent

active

054771749

ABSTRACT:
A ramp generator has an integrator, which provides a ramp output, and a counter, which counts a clock signal during the rise period. The counter and clock are arranged so that when the actual rise time is equal to the desired rise time, the counter overflows and returns to zero. If the rise time is too slow, the counter will contain a count at the end of the rise period. A register is connected to receive this count and an adder adds the contents of the register to the contents of the adder repeatedly each time a clock pulse is generated. The adder has an output connected to the input of the integrator and, each time the adder overflows, supplies a correction pulse to the integrator so that its rise rate is increased.

REFERENCES:
patent: 3764831 (1973-10-01), Zwitter et al.
patent: 3882486 (1975-05-01), Montefusco et al.
patent: 3914623 (1975-10-01), Clancy
patent: 4225825 (1980-09-01), Watts
patent: 4581585 (1986-04-01), Bristol
patent: 5394020 (1995-02-01), Nienaber

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