DIGITAL_SERVO_MODULATOR

Published:2009/7/23 23:20:00 Author:Jessie | From:SeekIC

Used to subtract two analog currents of digital-to-analog converter, giving phase-sensitive 60-cps square-wave output signal. Modulator is driven from 60-cps line to maintain precise phase relationship with two-phase servo motor. Modulator gives 2.4.mV p-p output signal for 2-microamp input signal on one side, and 1.1 V pp for 1-ma input signal on one side. First output corresponds to least significant digit error in Gray-to-binary converter, and latter to most significant digit error.-Texas Instruments Inc., Transistor Circuit Design, McGraw-Hill, N.Y., 1963, p 492.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Electrical_Equipment_Circuit/DIGITAL_SERVO_MODULATOR.html

Print this Page | Comments | Reading(3)