High speed ramp generator

Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Generating sawtooth or triangular output

Reexamination Certificate

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Details

C327S131000

Reexamination Certificate

active

07352216

ABSTRACT:
A high speed ramp generator is presented. The high speed ramp generator is advantageous over the prior art because it provides a ramp response without the delay incident with a simple integrator approach. A closed loop system generates a continuous ramp and, in an open loop manner, subtracts a mirror of the current ramp from itself. A switch is provided which when open, triggers an immediate current ramp output that is not dependent on the amplifier or any other component of prior art feedback circuits. Two such ramp generators may be used in tandem to provide alternating portions of a precision ramp signal, such as may be used to cancel the magnetization current induced in the primary of an isolation transformer.

REFERENCES:
patent: 5969513 (1999-10-01), Clark
patent: 6009534 (1999-12-01), Chiu et al.
patent: 6775161 (2004-08-01), Canova et al.
patent: 6989694 (2006-01-01), Garnier et al.
patent: 7271632 (2007-09-01), Cottin et al.
patent: 2004/0183517 (2004-09-01), Reilly et al.

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