Free Simple Circuit Diagram
The 200 MHz JFET has same features below: 1. Low crossmodulation 2. Large-signal handling ability 3. No neutralization 4. AGC controlled by biasiing the upper cascade JFET. Here’s the circuit diagram: The Idss of the upper unit must be greater than the lower unit, that’s the only special requirement of the 200 MHz JFET. [Source: National Semiconductor Application Note]
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this is a circuit of Step-Down Charge Pump Regulator for USB Powered Devices. The critical design parameter of this circuit is the circuit area. To solve this problem we can use Charge pump step-down circuit. This circuit only requires the charge pump controller and four ceramic capacitors. So it is a low cost circuit because of the low cost of […]
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This is a simple PWM modulator circuit. Comparing the message signal to a ramp or triangular waveform is the simplest way to produce a PWM signal. When the input is greater than the triangular waveform (the carrier), the resulting output is high, when the input is less than triangular waveform, the output is low. So, a comparator and triangular-waveform generator […]
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Using the following PMOS FET switch regulator output, in series with the regulator’s load as shown in the picture below is the most simple method. Switch placement should really be noted. To ensure that the regulator remains stable, the switch should be placed after regulators required minimum output capacitance (ie, C3). After regulators suddenly lit, FET Q1 operates as a […]
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