Free Simple Circuit Diagram
Colpitts oscillator can be implemented using op-amp as long as we have an op-amp with proper bandwidth. Here is an example of such circuit: LT1190 or LT1191 op-amps is used to serve as an excellent gain stages. Limiting the gain is done by two Schottky diodes, that maintain the signal at approximately +11dBm. This circuit give a low distortion performance, […]
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Fading a video signal can’t be done simply by attenuating the composite signal, since the synchronization signal may drop below unacceptable level. Here a circuit to overcome the problem: Most of video signals will works with this circuit, except for very noisy or distorted signals. The rest circuit is an LT1251 video fader (U2) configured to fade the signal ranging […]
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In this peak detector circuit, D1 is the detector diode and D2 is a level shifting or compensating diode. A load resistor RL is connected to – 5V and an identical bias resistor, RB, is used to bias the compensating diode. This equal value resistors RL and RB make sure that the diode drops are equal. High values of RB […]
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A schematic diagram of a fast pulse detector is show in the figure below. Error detection rate under 10% can be expected for 60 ns pulse. To get error free performance, it is recommended to use this circuit for detecting 100 ns or wider pulse. [Schematic diagram source: Linear Technology Application Notes]
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