Admtek Incorporated

Vaishali Nikhade

Khosrow Haj Sadeghi

The comparator includes a differential stage having a first input and a second input, an output stage in which the output is zero when the two inputs have therebetween a specific voltage difference, and a biasing stage providing a first biasing voltage and a second biasing voltage for respectively creating a second input voltage and a first input voltage respectively in the second and first inputs such that the two input voltages have therebetween the specific voltage difference. A method for forming the same includes steps of a) providing the differential stage, b) providing the output stage and c) providing the biasing stage which has a characteristic dependent on a manufacturing parameter such that the specific voltage difference is independent of the manufacturing parameter.

Offset comparator and method for forming same

The present invention provides a reliable method for oscillating an oscillator having an oscillator output without fail. The method includes steps of detecting whether the oscillator is regularly oscillating, and releasing the oscillator to oscillate when the oscillator is regularly oscillating, and holding the oscillator from oscillating until an enough control voltage is built-up therefor when the oscillator is not regularly oscillating. The present invention also provides a start up circuit for an oscillator having an oscillator output having a first state in a first instance and a second state in a second instance. The start up circuit includes a detecting device which includes a first input end for inputting therethrough the oscillator output, and a detecting output having a third state in a third instance and a fourth state in a fourth instance such that when the detecting output is in the third state, the oscillator is in a first work mode, and when the detecting output is in the fourth state, the oscillator is in a second work mode.

Growing community of inventors

Irvine, CA, United States of America

Vaishali Nikhade