Circuit arrangement for a memory cell of a D/A converter

Details Circuit arrangement for a memory cell of a D/A converter Circuit arrangement for a memory cell of a D/A converter

1997-12-11

1999-12-21

Nelms, David

Static information storage and retrieval

Systems using particular element

Flip-flop

341144, G11C 1100

Patent

active

060057920

ABSTRACT:
The binary values of the data word to be converted in a widely used type of D/A converter are supplied to a series of stages in which binarily stepped currents are supplied to a common output or derived therefrom, or are conducted to a second common output. To control the current switch, each stage comprises a flipflop in which the binary value to be converted is stored. Integration processes are often used in the integration of analog circuits by means of which digital circuit components cannot be usefully realized, for example, in the IIL technology. In the flipflop comprising cross-coupled transistors, the emitters are connected to a reference voltage which lies between ground potential and the supply voltage so as to obtain a favorable conversion of the digital signals for triggering the current switch. This renders it possible to connect the collectors of the transistors of the flipflop directly to the bases of the current switch. In addition, the control of the flipflop is simplified thereby, and the delay time is shortened.

REFERENCES:
patent: 5321401 (1994-06-01), White

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