Digitally controlled adaptive slew rate delta modulator

Details Digitally controlled adaptive slew rate delta modulator Digitally controlled adaptive slew rate delta modulator

1991-08-21

1993-05-04

Hoff, Marc

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

341166, 375 28, H03M 302

Patent

active

052085953

ABSTRACT:
A delta modulator automatically adjusting the slewing rate is disclosed. In the absence of a transition in the output data of a delta modulator, the current used for the integrator of the delta modulator is increased. When the comparator of the modulator indicates that the feedback signal of the modulator has overshot the input signal, the current is decreased or reversed until the two signals are approximately equal as signalled by a 50% duty cycle.

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International Search Report for International Application No. PCT/US92/01192 (date of mailing 21 Sep. 1992).
Tomasi, Wayne, Electronic Communications Systems: Fundamentals Through Advanced, Prentice Hall, Englewood Cliffs, N.J. 1988 (pp. 650-655).

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