在电源电压VDD的值达到第1阈值以上时,通过第1起动电路(20)开始带隙基准电路(10)的稳定动作,从带隙基准电路(10)输出第1电压值VA. Stable operation when the value of the supply voltage VDD reaches the first threshold, by first starting circuit (20) to start the bandgap reference circuit (10), from...
Power-on reset circuit
A power-on reset circuit is disclosed comprising a capacitor for being charged to a desired voltage and then being discharged; a Schmitt trigger circuit for discriminating the voltage discharged from the capacitor and transitioning instantaneously its output when the discharged voltage reaches a predeterm...
The present invention provides an improved Power-On-reset (POR) circuit providing enhanced reliability and automatic power-down capability, comprising a supply voltage sensing circuit (IS1,P1,VCCS), a delay element (1) connected to the output of the supply voltage sensing circuit, and a switch ...
PURPOSE: A power-on reset circuit is provided which is less dependent on process vagaries and temperature swings than that of prior reset circuits, is referenced to the more certain low-potential power rail, and enables transmission of a power-on signal at a selectable minimum potential of the...
A power-on reset circuit has first and second reference potential circuits and a comparator. The first and second reference potential circuits are such that their output voltage curves with respect to the power supply voltages intersect at a predetermined power supply voltage. The comparator compares...
A power-on reset circuit produces a momentary signal when the operating potential increases above a first threshold and when the operating potential decreases below a second threshold level. In a preferred embodiment, the circuit includes first and second IGFETs of first conductivity having their cond...
Power-on reset circuit and method There is provided a power-on reset circuit and method for a semiconductor integrated circuit device using a plurality of power sources, in which a power-on reset operation is stable and reliable, where the power-on reset circuit includes... YS Kim,Young-Dae...
PURPOSE:To incorporate an LSI power-on reset circuit by constituting the circuit with 2 MOS transistors(TRs). CONSTITUTION:The source and the gate of a p-channel MOS transistor(TR) are connected to a power supply 1, the drain and the source of an n-channel MOS TR 3 are connected to gr...
A power-on reset circuit. The power-on reset circuit includes a switch, a current source coupled between a first potential and a switch first contact; a resistive device having a resistive-device first contact coupled to the first potential; a first module coupled between a second potential and...