Floating point digital to analog converter with bias to establis

Details Floating point digital to analog converter with bias to establis Floating point digital to analog converter with bias to establis

1990-01-05

1991-06-04

Scott, J. R.

Coded data generation or conversion

Analog to or from digital conversion

Nonlinear

341154, H03M 170

Patent

active

050217852

ABSTRACT:
A digital-to-analog converter converts digital data in the floating-point representation into an analog signal. The mantissa part of the digital data is first converted into a first analog signal by an R-2R resistor ladder network. The first analog signal thus obtained is directly supplied to another r-2r resistor ladder network to produce second analog signals whose values are 2.sup.-N (N=0, 1, 2, . . . ) magnifications of the first analog signal. And, one of the second analog signals is selectively outputted in accordance with the exponent part of the digital data. A data converter is also provided for converting digital data in the form of a fix-point number into floating point data.

REFERENCES:
patent: 3303489 (1967-02-01), Krucoff
patent: 3555540 (1971-01-01), Hartke
patent: 3670326 (1972-06-01), Sloane
patent: 3673398 (1972-06-01), Loffbourrow
patent: 3705359 (1972-12-01), Kappes
patent: 4062013 (1977-12-01), Nagahama
patent: 4250492 (1981-02-01), Yamakido
patent: 4305063 (1981-12-01), Hanson
patent: 4618851 (1986-10-01), Watanabe
patent: 4727355 (1988-02-01), Kohdaka et al.
patent: 4951054 (1990-08-01), Kohdaka et al.
Hnatek, "A User's Handbook of D/A and A/D Converters", 6/1976, pp. 90-91.

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