Patent ID: 7136591
Filing Date: 2006-11-14
Classification: G08C,H04B

Abstract:
1. A sensor circuit which operates under control of a controller circuit, the sensor circuit comprising: a front end circuit which receives an input signal from a sensor element and amplifies the input signal to produce an amplified signal therefrom; a demodulator receiving the amplified signal and converting the amplified signal to a digital signal, wherein the demodulator comprises a threshold detector having at least one of a hysteresis level or a threshold as an operational parameter set under control of the controller circuit; wherein the front end circuit comprises an amplifier having programmable gain or transconductance that is set by an operational parameter set under control of the controller circuit; an interface circuit coupled to the controller and relaying operational parameters and commands from the controller to the demodulator and the front end circuit, and for relaying the digital signal to the controller; and an output circuit for producing an output signal in response to commands from the controller in response to receipt of the digital signal by the controller.