Scanning analog-to-digital converter operating under the subrang

Details Scanning analog-to-digital converter operating under the subrang Scanning analog-to-digital converter operating under the subrang

1994-05-11

1995-08-15

Mai, Tan V.

Boots, shoes, and leggings

G06J 100

Patent

active

054425751

ABSTRACT:
A sampling analog-to-digital converter operating in accordance with the subranging principle and with interpolation residue coding has a coarse value of the input signal applied to an integrator through a differential analog-to-digital converter (ADC) and a summer. The residue is also supplied to this integrator by conversion of the output of the integrator to an analog signal by a DAC and subtracting that signal from the input signal, advantageously supplied to the subtractor through a time-delay unit. The output of the subtractor is fed through an analog-to-digital converter which provides the second input to the above-mentioned summer. By comparison with the internal ADCs, the sampling circuit has a greater dynamic range and higher resolution and precision. It is particularly suited for input signals with rapid rise and slow decay as obtained from semiconductor detectors of a nuclear spectrometer.

REFERENCES:
patent: 4093989 (1978-06-01), Flink et al.
patent: 4373189 (1983-02-01), Weant
patent: 5150324 (1992-09-01), Takasuka et al.
patent: 5307299 (1994-04-01), Stein et al.

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