Wideband Waveform Generator Schematic Circuit Diagram

This circuit is designed to provide a wideband digital sine wave signal source. Its main feature is that because it synthesizes the signal in 32 steps, no low-pass filter is required to suppress the odd harmonics. A well-known method for synthesizing a sine wave under control of an input frequency is to apply a low-pass[…]

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Noise-Driven Sound Generator Schematic Diagram

Noise-Driven Sound Generator Schematic Circuit Diagram

The sound generator shown here uses its built-in loudspeaker as a microphone when it is in the standby state. As soon as it detects a noise that exceeds an adjustable threshold level, it becomes active. This small, clever circuit can be used as an alarm generator that reacts to noises. You can also use it[…]

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Noise generator

Noise generators are used for measuring the self-noise of amplifiers and receivers and for some acoustic measurements. The noise of traditional low-frequency noise generators is based on the stochastic properties of an ion current resulting from a gas discharge. A simple noise generator can, however. be designed without a special gas discharge tubes the reverse-biased[…]

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