Calibration circuit of electronic device

The utility model discloses a calibration circuit of an electronic device. The calibration circuit comprises an operational amplifier (OPAMP) and a universal meter. A measuring resistor (R-SENC) is bridge connected between the current output positive end (CURRENT+) and the current output negative en...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	YAO XIANQING, ZHU ZHIYONG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PHYSICS TESTING
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Beschreibung
Zusammenfassung:	The utility model discloses a calibration circuit of an electronic device. The calibration circuit comprises an operational amplifier (OPAMP) and a universal meter. A measuring resistor (R-SENC) is bridge connected between the current output positive end (CURRENT+) and the current output negative end (CURRENT-) of the electronic device to be calibrated. A VCC end is connected with the positive input end of the operational amplifier (OPAMP) through a first current-limiting resistor (R1). The current output positive end (CURRENT+) is connected with the negative input end of the operational amplifier (OPAMP) through a second current-limiting resistor (R2). A diode (D1) is bridge connected between the negative input end of the operational amplifier (OPAMP) and the current output negative end (CURRENT-). The output end of the operational amplifier (OPAMP) is connected with the TRIG end of the universal meter through a third current-limiting resistor (R3). The calibration circuit of the electronic device is simple