Patent
Electronic low power clock circuit and method
TLDR
In this paper, a relatively low frequency oscillator in junction with a much higher frequency oscillators is used to produce a clock that is both accurate and minimizes power consumption, where the output of the high-frequency oscillator is counted during its operation period, and the amount counted is accumulated for subsequent time periods.Abstract:
A relatively low frequency oscillator in junction with a much higher frequency oscillator is used to produce a clock that is both accurate and minimizes power consumption. The high frequency oscillator is enabled only during a small portion of the clock's operation and is used to gauge the output of the low frequency oscillator. The output of the high frequency oscillator is counted during its operation period, and the amount counted is accumulated for subsequent time periods. When the accumulated count reaches a predetermined value, a clock output is provided.read more
Citations
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References
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Proceedings ArticleDOI
Low-power design: ways to approach the limits
TL;DR: It has now become necessary to build new products with at least the same performance in speed and dynamic range, but with stringent requirements on low power, which raises questions about the limits and how they can be approached.
Patent
Time measurement system
Harri Jokinen,Sakari Jorri +1 more
TL;DR: A time measurement system for measuring time accurately with an inaccurate clock, in which two clock oscillators are compared and the momentary error of the slower clock oscillator is measured, is described in this article.
Patent
Closed loop temperature compensated frequency reference
TL;DR: In this article, an oscillator is temperature compensated by adjusting a slave oscillator with an error signal, that is produced by using the temperature of a reference oscillator to determine the frequency error of the reference oscillators, and then adjusting the frequency of the slave oscillators until its frequency coincides with an ambient reference frequency.
Patent
Time compensated clock oscillator
TL;DR: In this paper, a time compensated clock oscillator is proposed that has a first low power oscillator that drives an output device such as a time-of-day clock, a second more precise oscillator whose output is compared to the output of the first oscillator, and develops a correction signal that is used to periodically correct the output device.
Proceedings ArticleDOI
A microprocessor-based analog wristwatch chip with 3 seconds/year accuracy
TL;DR: In this paper, a field test on 20 watch samples containing an oscillator built around this quartz showed that over a 3-year period, the maximum deviation is less than 3 seconds/year.