Temperature measuring circuit
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
- Publication Date
- 2008-04-30
Smart Images
Figure 1 
Figure 2 
Figure 3
Abstract
Description
【Technical field】
[0001] The invention relates to a temperature measuring circuit, in particular to a temperature measuring circuit which converts a temperature signal into an electric signal through a temperature sensor, and then performs A / D sampling and processing on the electric signal. 【Background technique】
[0002] In many modern products, accurate measurement of temperature is required. The current temperature acquisition methods include two-wire system, three-wire system, single-channel and multi-channel temperature measurement methods. Among them, the three-wire multi-channel temperature is a relatively new temperature acquisition technology solution. The Chinese patent with the patent number 03263202.9 and the invention name "A Thermal Resistance Temperature Measurement Circuit" discloses this technology. The schematic diagram of its principle is as follows figure 1 shown. This scheme uses a single constant current source to work, U1 is a voltage follower, and U...