Back to results
US 6,639,432 B1Granted
Self calibrating, zero power precision input threshold circuit
AssigneeCypress Semiconductor Corporation
InventorTimothy J. Williams
Life of this patent
Estimating the term…
Abstract
An apparatus comprising one or more input circuits. The input circuit may be configured to generate an output signal in response to (i) an input signal and (ii) an input threshold. The input threshold may be set in response to a control input.
Claims20
An apparatus comprising:
- an input circuit (a) comprising a number amplifier stages having inputs coupled together and outputs coupled together and (b) configured to generate an output signal in response to (i) an input signal and (ii) a first control signal, wherein said output signal changes state at different levels of said input signal in response to different settings of said first control signal;
- and
- a calibration circuit configured to adjust said first control signal in response to a (i) second control signal and (ii) one or more reference signals comprising a fraction of a supply voltage.
An apparatus comprising:
- means for generating an output signal in response to (i) an input signal and (ii) a first control signal, said generating means comprising a number of amplifier stages having inputs coupled together and outputs coupled together, wherein said output signal changes states at different levels of said input signal in response to different settings of said first control signal;
- an
- means for adjusting said first control signal in response to (i) a second control signal and (ii) one or more reference signals comprising a fraction of a supply voltage.
A method for providing a self calibrating, zero DC power precision input threshold voltage comprising the steps of:
- (A) generating an output signal via a number of amplifier stages having inputs coupled together and outputs coupled together in response to an input signal and a first control signal;
- (B) changing states of said output signal at different levels of said input signal in response to different settings of said first control signal;
- and
- (C) adjusting said first control signal in response to (i) a second control signal and (ii) one or more reference signals comprising a fraction of a supply voltage.
1 more element
Dependencies are inferred from the claim text.