Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!ucsd!sdcsvax!ucsdhub!hp-sdd!hplabs!hpl-opus!jewett
From: jewett@hpl-opus.HP.COM (Bob Jewett)
Newsgroups: sci.electronics
Subject: Re: Square to Sawtooth
Message-ID: <65200002@hpl-opus.HP.COM>
Date: 29 Mar 89 18:12:04 GMT
References: <7476@thorin.cs.unc.edu>
Organization: HP Labs, High Speed Electronics Dept., Palo Alto, CA
Lines: 11

> 		Given an externally generated square wave of varying 
> 	frequency(audio range) and varying amplitude, what is the best/
> 	easiest way of converting it to a sawtooth of the same frequency
> 	and amplitude? 

One solution:

Find a VCO that has a unit-amplitude sawtooth as an auxiliary output.
Phase lock the VCO to the input square wave.  To get the amplitude
right, full-wave rectify the square wave and apply the result and the
sawtooth to an analog multiplier.