Indirect D/A converter

Details Indirect D/A converter Indirect D/A converter

1988-04-26

1991-08-20

Shoop, Jr., William M.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

341120, H03M 166

Patent

active

050418319

ABSTRACT:
A plural channel indirect digital to analog converter. Words containing address bits and data bits are received on an input and entered into a specific one of the converter channels under control of the address bits of the word. The data bits are applied to a binary rate multiplier of the channel which generates a pulse modulated output signal representing the binary value of the received data bits. The pulse modulated output signal is applied to an associated filter which converts the pulse modulated signal to an analog output signal whose amplitude represents the binary value of the received data bits. Gating circuitry ensures that each output pulse is of a precisely controlled pulse width. One of the converter channels is used to calibrate the output level of the filters. The number of data bits applied to the different channels may need not be the same and may vary in number from a minimum of 1 to a maximum of m.

REFERENCES:
patent: 4065765 (1977-12-01), Wagner
patent: 4636773 (1987-01-01), Lewis et al.
H. Schmid, Electronic Analog Digital Conversion, Van Nostrand Reinhold, N.Y., 1970, chapter 7, pp. 165-229.

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