Patent ID: 8786361
Filing Date: 2014-07-22
Classification: G01D,H03K

Abstract:
1. An sensor processing circuit comprising: a first and second signal processing interface; a processing system connected to an output of each of said first and second signal processing interfaces; a biasing voltage source switchably coupled to said first signal processing interface via a first switch assembly and switchably coupled to said second signal processing interface via a second switch assembly; and a first control output of said processing system controllably coupled to said first switch assembly and a second control output of said processing system controllably couple to said second switch assembly; wherein said processing system includes a memory storing instructions operable to cause said sensor processing circuit to perform the steps of: connecting a first of said first and second signal processing interfaces to the biasing voltage source, thereby causing said first signal processing interface to pass a sensor signal to the processing system; disconnecting said first of said first and second processing interfaces from said biasing voltage source and connecting a second of said signal processing interfaces to said biasing voltage source while said sensor system is operating at a high temperature; disconnecting said second of said at least two signal processing interfaces from said biasing voltage and connecting a first of said signal processing interfaces to said biasing voltage while said sensor system is operating at a high temperature; and alternating the steps of disconnecting said first of said first and second processing interfaces from said biasing voltage source and connecting a second of said signal processing interfaces to said biasing voltage source while said sensor system is operating at a high temperature and disconnecting said second of said at least two signal processing interfaces from said biasing voltage and connecting a first of said signal processing interfaces to said biasing voltage while said sensor system is operating at a high temperature, at a set time period, wherein said set time period is substantially less than a time period required for ionic contamination to place said sensor signals out of tolerance.