Pulse-width to voltage converter

Details Pulse-width to voltage converter Pulse-width to voltage converter

2005-08-16

2005-08-16

Tokar, Michael (Department: 2819)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Particular error voltage control

C331S016000

Reexamination Certificate

active

06930558

ABSTRACT:
Apparatus for deriving an analog signal from a pulse-width modulated signal, for use in a closed-loop control system such as a phase-locked loop, is arranged to provide non-linear conversion such that the ratio of the magnitude of the analog output signal to the pulse width is greater for larger pulse widths than for smaller pulse widths. In the illustrated apparatus the output signal is derived by an integrator, gated by the pulse-width modulated signals, for integrating, during the duration of a pulse, a signal that increases with time. The increasing signal may be supplied by a positive feedback arrangement from the output of the integrator, or by a feed-forward arrangement from the output of a further gated integrator arranged to integrate a constant signal.

REFERENCES:
patent: 5081427 (1992-01-01), Suarez
patent: 5617058 (1997-04-01), Adrian et al.
patent: 5629651 (1997-05-01), Mizuno
patent: 6215363 (2001-04-01), Conta et al.
patent: 6308049 (2001-10-01), Bellaouar et al.
patent: 6642799 (2003-11-01), Tang

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