12V to 9V 2A step down dc converter using IC 741 and 2N3055

Thursday, November 6th, 2008

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This circuit designs for modify power supply input 12V from battery or the other. Have the level voltage be down be left 9V be stable or , 9V at 2 Amp DC power supply . By this circuit gives usual equipment , seek easy. Be [...]

Micropower Voltage Reference with LM4250

Sunday, September 28th, 2008

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A low-drift voltage reference can be easily made by converting a zero temperature coefficient current to a voltage. JFETs biased slightly below pinch-off exhibit a zero temperature coefficient drain current (ID) as shown in Figure 1. With the above property and a micropower operational amplifier, used to convert the drain current to a voltage, a [...]

Basic DC voltage Regulated 13V low current.

Friday, August 22nd, 2008

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Today I searches the circuit in old book. Meet power supply circuit. very plentiful may advantage with friends. Then bring see this circuit basically the base of DC voltage Regulator follow the circuit gives voltage , get +13V and -13V by it uses Zener Diode . Perform maintain one’s position voltage. Be stable [...]