Free Simple Circuit Diagram
Diode and capacitor can be used to clamp an AC signal, shift the level into positive region for all cycle. Sometimes this condition is needed, to have positive state at all time, for example in some analog-to-digital conversion. At first of its operation, when the signal is in a direction diode forward, the capacitor is charged until the peak level […]
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Zener diode has been commonly used as signal limiter. With a single diode and a resistor, the limiter will limit the half cycle of a signal to it’s forward bias and and the other half cycle to its reverse breakdown voltage. Using two back-to-back Zener diodes, the limiter will now limit full cycle symmetrically. In audio application, limiting an audio […]
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Below is a passive surround converter/adapter circuit diagram. To make this circuit works, passive surround doesn’t required any active components. This circuit only need the combined of resistors and electrolytic capacitors. Do not use woofer or tweeter speakers for rear speakers but use full range type of speaker. We must use 5W resistor. Usage of 1/4 or 1/2 watt resistor […]
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In the Darlington configuration, this emitter follower has a pair of transistors. The emitter current of one transistor becomes the base current of the second in this arrangement. The Darlington configuration acts like one transistor with a beta which is the product of the betas of the two transistors. Where high output currents are needed, they can be used. The […]
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