A High Temperature Sigma Delta Modulator Asic

Solid state devices are used more and more to provide computerised control and sensing in high temperature environments. The market for electronics, in instrumentation and control systems in down-hole applications for petroleum exploration, requires increased performance from electronic components in terms of both duration and temperature. Substantial improvements in performance and cost of complex instrumentation systems incorporating electronic controls and sensors, could be obtained if their circuitry operated reliably at elevated temperatures. Many companies now require instrumentation equipment that tolerates up to 200°C over many months or even years.