A CMOS sensor and signal conversion chip for monitoring arterial blood pressure and temperature

A data acquisition system for arterial measurement of blood pressure and temperature is presented. It consists of a planar etched capacitive pressure sensor, a temperature sensor and readout electronics for signal conditioning, amplification and A/D conversion. The whole system is monolithically integrated on a single chip with dimensions of 7.2 x 0.7 mmü and can be embedded into a catheter of 1 mm diameter.