Emitter Follower + LPF Sine Convert for CD4060

mking · 2014-01-17T12:05:26+00:00

I am looking at using a CD4060 and 32.768Hz crystal, running off 4 x AAA cells, to produce a reference 16Hz sine wave. Required output is 5Vpp at 50ma to drive an optical array. We will need a quantity of these little circuits and prefer minumum component count and cost. Is there a way to use a single transistor emitter follower and combine it with an RC smoothing filter to do the job? The "sine wave" can be approximate, e.g. a well rounded square wave. Any ideas would be appreciated. I considered uisng a phase shift oscillator, but prefer the option of multiple output frequencies the CD4060 affords. Martin King

Jan 17, 2014 82 Replies

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Bill Sloman 12 years ago

I doubt if it does. This computer is about a year old and relies an Intel i5-3470 quad core running at 3.2GHz. I occasionally swap LTSpice simulations with my friend in London, and it doesn't seem to run them unusually slowly.

Bill Sloman, Sydney

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Bill Sloman 12 years ago

You may have installed a different SPICE model for the P-channel MOSFET. What sort of simulation speed did you see?

Bill Sloman, Sydney

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Maynard A. Philbrook Jr. 12 years ago

You're giving him to much credit, Vic20 or Coco is the best he has!

Jamie

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