Coded data generation or conversion – Converter compensation
Patent
1991-11-27
1993-03-30
Hoff, Marc S.
Coded data generation or conversion
Converter compensation
341145, H03M 106
Patent
active
051988143
ABSTRACT:
A digital-to-analog converter having a main analog conversion part which carries out digital to analog conversion of input digital signals, an auxiliary analog conversion part which compensates the digital-to-analog conversion error, a memory circuit which accumulates the compensation data for compensating the conversion error, a register circuit which inputs the output signal of the memory circuit, and a matrix switching circuit which selects the output signal of the register circuit by means of the higher order bits of the input digital signal.
Prior to the start of the digital-to-analog conversion operation the compensation data accumulated in the memory circuit are transferred to the register circuit. Later, at the time of the digital to analog conversion operation the matrix switching circuit is controlled by means of the higher order bits of the input digital signal selects the data held in the register circuit, and carries out the compensation of the error in the analog conversion.
REFERENCES:
patent: 4340882 (1982-07-01), Maio et al.
patent: 4808998 (1989-02-01), Yamada
patent: 4843392 (1989-06-01), Gulczynski
patent: 4963870 (1990-10-01), Obinata
Ogawara Takeshi
Takiguchi Tomio
Hoff Marc S.
NEC Corporation
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