• on Miscellaneous Electronics
  • Published in issue 5/2004 on page 0
About the article

Combi-gate Oscillator IC

Many of you will know that a digital oscillator built from unbuffered inverters in a 74xx04U IC has to be followed by a ‘normal’ gate. Both functions are now available from a single IC produced by Philips.A quartz crystal oscillator built around an unbuffered logic gate type 74HC04U traditionally employs a high feedback resistance to be effectively turned into a high-gain linear amplifier (Figure 1). The frequency-determining quartz crystal is also inserted in the feedback path, its resonance characteristics forcing the circuit to oscillate at the crystal frequency.
Downloading of this magazine article is reserved for Elektor Members only.
Already a member? click here to log in.
Loading comments...