Patent ID: 6851849
Filing Date: 2005-02-08
Classification: G01J,G01K,H04N

Abstract:
1. A temperature measurement device comprising: a bias voltage supply circuit for outputting an output voltage between a first and second outputs; a semiconductor diode applied at one end with the first output of said bias circuit as a forward bias voltage; a first operational amplifier circuit having a first input connected to the other end of said semiconductor diode, a second input supplied with the second output of said bias voltage supply circuit, and an output for temperature measurement, wherein said bias voltage supply circuit is serially inserted between said semiconductor diode and said first operational amplifier circuit, thereby said semiconductor diode, said bias voltage supply circuit, and said first operational amplifier circuit are connected in series and adjustment in order to have a desired temperature sensitivity is made possible by: adjusting the output voltage of said bias voltage supply circuit; thereby adjusting the forward bias voltage of said semiconductor diode; and adjusting its potential barrier height.