Double-input analog-to-digital converter using a single converte

Details Double-input analog-to-digital converter using a single converte Double-input analog-to-digital converter using a single converte

1995-05-18

1997-12-09

Gaffin, Jeffrey A.

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

348572, 341158, H03M 114, H03M 134

Patent

active

056965109

ABSTRACT:
The disclosure is an analog-to-digital converter of half-flash type providing for the multiplexing of two analog input signals and therefore requiring only one converter module. It includes a coarse comparator block used to determine the most significant bits of the converted signals and also determining the voltage range for two fine comparator blocks that determine the least significant bits of the converted signals, wherein each of the input signals is connected to a fine comparator block and said coarse comparator block compares alternatively the first and second input signals with a reference voltage. The analog-to-digital converter can be advantageously used for processing television signals.

REFERENCES:
patent: 4791488 (1988-12-01), Fukazawa et al.
patent: 4893122 (1990-01-01), Hoehn
patent: 4903028 (1990-02-01), Fukushima
patent: 5349354 (1994-09-01), Ito et al.
An 8 MHz CMOS Subranging 8-Bit A/D Converter, A.G.F. Dingwall, & V. Zazzu, IEEE Journal of Solid-State Circuits, vol.SC-20, No. 6, pp. 1138-1143, Dec. 1985.
THPM 24.3, CMOS, 1u, 8b, 50MHz Averaging Flash A/DC Building Block, A.G.F. Dingwall et al., (no publication date).

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