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US 6,147,635 AGranted
Timer for A/D converter
AssigneeSiemens Aktiengesellschaft
InventorsJens Barrenscheen, Peter Rohm, Gunther Fenzl
Life of this patent
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Abstract
A timer for an A/D converter generates a request signal for A/D conversion by the A/D converter. In addition to the usual request signal, the timer produces a further signal which is used, before one cycle of the timer has elapsed, to block the A/D converter for low-priority requests from other requesting devices and to reserve it for the timer. In this manner, the signal to be converted from the timer can be sampled at reproducible, equidistant instants without having to wait for the end of the last conversion.
Claims12
A timer for an A/D converter, comprising:
- a request device adapted to produce a first request signal for an A/D converter to perform A/D conversion on an analog signal allocated to the timer during a cyclically repeated, defined time interval;
- said request device further producing a second request signal, from a specific instant before the defined time interval has elapsed and up to an end of the defined time interval T.sub.G, the second request signal to be evaluated in combination with the first request signal for A/D conversion by the A/D converter.
Dependencies are inferred from the claim text.