Simple Function Generator: With Reverse-Order Signal Creation
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In a single instrument, sine, triangular, and rectangular waveforms are usually generated using R-C charge/discharge networks followed by appropriate filters. Alternatively and certainly more fashionably these days, such signals can be synthesized by a microprocessor. The function generator described here follows a conceptually different approach and matching circuitry.
Function Generator
A function generator is an instrument that generates more than one waveform of variable frequency and, optionally, amplitude. This is a useful device necessary in labs for testing, tweaking, faultfinding, repairing and tuning electronic devices.
In most function generators of classic design, a rectangular-pulse generator is used as the starting point. Next comes a rectangular-to-triangular voltage converter usually based on the charge/discharge process. Next, the triangular waveform is transformed into a kind of sinewave, usually including good suppression of the first harmonic.
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