Category Archives: Signal Processing

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MAX1703 Single-Cell Boost Converter Circuit

When you design a circuit with only a single-cell battery, you will need boost-converter to provide enough voltage for most ...

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55MHz Scope Sensitivity Amplifier

Scope sensitivity amplifier is a vital front-end signal processing for every scope instruments. The function of this circuitry is simple: ...

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Two-Band Bxandall Active Tone Control

Using active circuit for tone control means that we can provide cut and boost, maintaining overall amplifying factor of original ...

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Pulse Width (PWM) Controller Circuit

A LM3900 quad operational amplifier can be used to build a pulse width (PWM) controller. The LM3900 was chosen because ...

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Small TV Modulator Using A Motorola MC1374

How can television modulator be small and simple like this? First, it uses integrated circuit, and the second, any TV ...

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Amplitude Modulator with OTA

Circuit described in the schematic diagram below can achieve 99% modulation easily with maximum frequency of 200kHz. The amplification of this circuit can be controlled easily since the transconductance of an operational transconductance amplifier is directly propotional to the control … Continue reading

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50 kHz FM Optical Receiver

Frequency modulation (FM) can be used to transmit analog voltage level signal with good noise immunity. The transmission itself¬† might employs different methods, and this circuit uses free air optical medium. This optical receiver circuit is built using a L14G2 … Continue reading

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LM331 Frequency to Voltage Converter

The frequency to voltage converter circuit illustrated in the schematic diagram below produces a 10 V output for 10 kHz full scale input (square waves or pulses).¬† The simplicity of the circuit doesn’t mean a bad performance: this circuit has … Continue reading

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High-Impedance Input Hi-Fi Tone Control

Tone control circuit is an electronic circuit which is designed to manipulate the tone of audio signal. Tone of audio signal is analog to color in light. We don’t call the tone of audio signal as red, green or or … Continue reading

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