JPS61205081U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はこの考案に係る可変抵抗式センサの抵
抗値検出回路の一実施例を示す回路図、第２図は
同じく他の実施例を示す回路図、第３図は従来の
可変抵抗式センサの抵抗値検出回路の一例を示す
回路図、第４図は同じく従来の他の例を示す回路
図である。 １１は可変抵抗式センサ、１２は検出抵抗器、
１３は負荷抵抗器、１４は電圧源、１５はアナロ
グ・デジタル変換回路、１６，１７はスイツチ、
１８は基準電圧発生器、１９は電流源。 Fig. 1 is a circuit diagram showing one embodiment of the resistance value detection circuit of a variable resistance sensor according to this invention, Fig. 2 is a circuit diagram showing another embodiment, and Fig. 3 is a circuit diagram of a conventional variable resistance sensor. FIG. 4 is a circuit diagram showing an example of a resistance value detection circuit, and FIG. 4 is a circuit diagram showing another conventional example. 11 is a variable resistance type sensor, 12 is a detection resistor,
13 is a load resistor, 14 is a voltage source, 15 is an analog-to-digital conversion circuit, 16 and 17 are switches,
18 is a reference voltage generator, and 19 is a current source.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 可変抵抗式センサ１１と検出抵抗器１２との直
列回路を、負荷抵抗器１３を介して電圧源１４に
接続するか、又は直接電流源１９に接続すると共
に、前記検出抵抗器１２の両端に発生する電圧信
号と基準電圧発生器１８からの基準電圧とをアナ
ログ・デジタル変換回路１５に供給し、該アナロ
グ・デジタル変換回路による前記電圧信号に対応
するアナログ・デジタル変換値に基づいて前記セ
ンサ１１の抵抗値を検出してなることを特徴とす
る可変抵抗式センサの抵抗値検出回路。 A series circuit of a variable resistance type sensor 11 and a detection resistor 12 is connected to a voltage source 14 via a load resistor 13 or directly to a current source 19, and a voltage is generated across the detection resistor 12. The voltage signal and the reference voltage from the reference voltage generator 18 are supplied to the analog-to-digital conversion circuit 15, and the sensor 11 is converted based on the analog-to-digital conversion value corresponding to the voltage signal by the analog-to-digital conversion circuit. A resistance value detection circuit for a variable resistance sensor characterized by detecting a resistance value.