This is a
design circuit for high frequency waveform generator
is very useful in electronic experiment and design. This circuit is generate
sine wave oscillation, but actually we can modify the circuit to generate
triangle or square wave function. The core of this waveform generator is
MAX038. This integrated circuit chip gives complete function to build a
waveform generator/function generator. This is the figure of the circuit;
The
frequency can be controlled using current. If we disconnect the 20k RIN from
REF (pin 1) and connect it to a DAC, then we can control the frequency using
microcontroller or digital interface. We can even control the chip using a
quartz crystal (PLL) by controlling the current using a phase comparator output
that compares the sync output (pin 14 of MAX038) and a reference clock from
quartz crystal oscillator. This waveform generator integrated circuit chip is
very interesting since it can generate 0.1Hz to 20MHz, very wide operating
frequency, as expected for every waveform generator instruments.
