Coded data generation or conversion – Analog to or from digital conversion – With particular solid state devices
Patent
1990-06-06
1991-05-21
Pellinen, A. D.
Coded data generation or conversion
Analog to or from digital conversion
With particular solid state devices
341145, 341153, H03M 168
Patent
active
050179195
ABSTRACT:
A DAC embodied in a CMOS integrated circuit converts a multi-bit digital signal to an analog-current signal. A higher-order portion of the digital signal, e.g., the most significant 5 bits of a byte, are decoded separately from the lower-order portion, e.g., the 3 least significant bits. The DAC includes circuitry for producing a first bias voltage, a first set of current sources each biased by the first bias voltage to produce a switchable current having a unit magnitude, and switching circuitry controlled by the decoded lower-order portion to cause a selected number of the unit-magnitude currents to contribute to the analog-current signal. The DAC further includes circuitry for producing a second bias voltage, a second set of current sources each biased by the second bias voltage to produce a switchable current having a multi-unit magnitude, and switching circuitry controlled by the decoded higher-order portion to cause a selected number of the multi-unit-magnitude currents to contribute to the analog-current signal.
REFERENCES:
patent: 4064506 (1977-12-01), Cartwright, Jr.
patent: 4311988 (1982-01-01), Kelly et al.
patent: 4393370 (1983-07-01), Hareyama
patent: 4553132 (1985-11-01), Dingwall et al.
patent: 4558242 (1985-12-01), Tuthill et al.
patent: 4583076 (1986-04-01), Luschnig
patent: 4635038 (1987-01-01), Winch
patent: 4725813 (1988-02-01), Miyada
patent: 4800365 (1989-01-01), White et al.
patent: 4827260 (1989-05-01), Sugawa et al.
patent: 4859930 (1989-08-01), Schouwenaars et al.
Hull Richard W.
O'Shaughnessy Timothy G.
Pellinen A. D.
Western Digital Corporation
Williams H. L.
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