| 摘要 |
PURPOSE:To simplify the constitution of a titled circuit, and also to improve its reliability by constituting it of parts which scarcely cause a fault comparatively, such as a resistance, a diode, etc. CONSTITUTION:A voltage comparing circuit compares this voltage to be detected Ex with reference voltage Es, and outputs a detecting signal when its difference exceeds a prescribed value. A terminal 01 is connected to a constant-current output use power source circuit Ess, and a terminal 02 is grounded. A terminal C1 is connected to a reference voltage source Es, and a terminal C2 is connected to a voltage source to be detected Ex. A diode D1 and D2, and a diode D3 and D4 are connected in series, respectively, between the detecting terminals 01, 02 so as to become a forward direction to an output I of the constant-current output use power source circuit Ess. A connecting point of the diode D1 and D2, and a connecting point of the diode D3 and D4 are connected to the comparing terminal C1 and the comparing terminal C2, respectively.
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