Patent ID: 7685216
Filing Date: 2010-03-23
Classification: H03H

Abstract:
1. Auto-resetting recursive digital filter circuitry comprising: a three-wire serial interface circuit receiving a serial clock input signal, a synchronization input signal, and a serial data input signal, and, in response thereto, producing a serial clock output signal, a synchronization output signal, and a parallel data output signal; a recursive digital filter circuit coupled to receive the serial clock output signal, the synchronization output signal, and the parallel data output signal and, in response thereto, producing a filtered over-sampled data output signal; and an input fault detection circuit having first and second inputs coupled to receive the serial clock input signal and the synchronization input signal, respectively, for detecting a fault associated with one of the synchronization input signal and the serial clock input signal and producing a reset signal coupled to reset the recursive digital filter circuit in response to detection of the fault.