Ultra low-power fast start precision RC oscillator

Details Ultra low-power fast start precision RC oscillator Ultra low-power fast start precision RC oscillator

1997-12-31

1999-12-21

Grimm, Siegfried H.

Oscillators

Bridge type

R.c. or r.l. type

331143, 331185, H03K 30231

Patent

active

060054492

ABSTRACT:
An ultra-low power, fast start fuze oscillator contained in a fast moving projectile which contains a programmable projectile fuze. It is an RC oscillator which uses a low power comparator, three biasing resistors, a timing resistor and a timing capacitor to produce an output frequency as low as 8 kHz with a frequency error of less than .+-.0.1% over a -40.degree. C. to +60.degree. C. temperature range. At the same time, it is capable of surviving a high g environment (30,000 g to 60,000 g) in a reliable manner. Furthermore, the oscillator draws a very low amount of power, using a maximum of about 20 uA of current and has a start-up time limited to a maximum of 1.5 msec. An additional circuit can be connected to the positive supply voltage input of a lower current version of an RC oscillator to jump start the RC oscillator, thereby improving start-up time to 1.5 msec while reducing the current drain to 15 uA.

REFERENCES:
patent: 4450518 (1984-05-01), Klee
patent: 4530321 (1985-07-01), Caron et al.
patent: 4667171 (1987-05-01), Matthys
patent: 5182528 (1993-01-01), Zuta
patent: 5272327 (1993-12-01), Mitchell et al.
patent: 5508664 (1996-04-01), Rizzo

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