Coded data generation or conversion – Analog to or from digital conversion – Analog to digital conversion
Patent
1993-04-19
1994-04-26
Young, Brian K.
Coded data generation or conversion
Analog to or from digital conversion
Analog to digital conversion
341155, H03M 136
Patent
active
053070674
ABSTRACT:
By making a folded waveform of a folding circuit sharp, the number of elements used in an ADC is reduced and less power consumption is achieved. A folding circuit is composed of a plurality of master-comparator latches, a pair of wiring means for master-to-slave connection, and a slave latch. By means of the wiring means, the non-inverted outputs and the inverted outputs of the master-comparators latches are alternately drawn in the order of magnitude of reference voltages, superimposed, and fed into a pair of inputs of the slave latch. A Gray code signal is directly encoded by an encoder according to the output of the slave latch. A folded signal, which is the output of the folding circuit, takes a sharp waveform. The number of slave latches can be reduced. No XOR gates are required.
REFERENCES:
patent: 4599602 (1986-07-01), Matzuzawa et al.
patent: 4777470 (1988-10-01), Naylor et al.
patent: 4931797 (1990-06-01), Kagawa et al.
patent: 5181035 (1993-01-01), Mouret
Arbel et al.., "Fast ADC", IEEE Transactions on Nuclear Science, vol. NS-22, pp. 446-451, (Feb. 1975).
Kimura Hiroshi
Matsuzawa Akira
Matsushita Electric - Industrial Co., Ltd.
Young Brian K.
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