JFET Low Noise Preamp

Noise, in amplifier circuit, is generated intrinsically by each components inside the circuit. Resistor, capacitor, and semiconductor generate noises. By simplifying the design of a circuit, we can minimize the noise especially if we can push the number of components to the lowest count. Here is one example of such design. The gain of this low noise amplifier is determined […]

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LM359 Fast Photodiode Amplifier

Photo-diode can be used for high speed digital transmission, but you have to provide high speed signal conditioner for that purpose. The amplifier circuit shown in the schematic diagram below satisfy the high-speed requirement. The circuit is based on current mode (Norton) operational amplifier, that’s why the response is faster than regular op-amp.  The frequency response of this circuit is […]

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