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  • High frequency waveform generator is very useful in electronic experiment and design. This circuit 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.

    High frequency waveform generator circuit diagram

    high frequency generator circuit schematic

    • The circuit can be used to generate square wave, triangle, or sine wave by programming the pin inputs (A0:pin 3, A1:pin 4).
      • A0 A1 WAVEFORM
      • X 1 Sine wave
      • 0 0 Square wave
      • 1 0 Triangle wave
    • 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.

    
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    5 Responses to "High Frequency Generator Circuit"

    1. SIMPLE AND NICE PRESENTATION

    2. prashanth suvarna says: on May 21, 2014 at 1:44 pm

      Mmmmmm….. very nice & an elegant circuit. Pssst jst 4 the rec… isn,t this similiar 2 Intersil Ic 8038. It even sounds the same. aonly m not2sure…

    3. Any recommended circuit to produce 1 to 1.1 GHz output ??

    4. what does the symbol in the mid right side of the diagram at the end of the sine wave output means

      • PrashanthSuvarna says: on September 9, 2014 at 11:46 pm

        Oh Kevin, It simply sez that the triangle wave that emits from the sig gen is a lo level signal(In this case a triangle wave)suscept to ingress of RF “Pollution” that could pollute the feeble signal easily&as such it should be escorted out of the unit thru a shielded wire as is done in many other applications like audio signals etc.In short it is the starting point of a shielded wire/cable as applicable…

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