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Subject: Re: Audio Phase meter cct wanted
X-Newsreader: Microsoft Outlook Express 5.50.4807.1700
Date: Tue, 19 Nov 2002 08:00:13 +1300
NNTP-Posting-Date: Tue, 19 Nov 2002 08:00:15 NZDT
Thanks very much Jan for the information, yes the Elektor project sounds
just what I need.
I'll try and find a copy. Does anyone have one?
"J.Koning" wrote in message
> Jeff heeft geschreven in bericht ...
> >I need a simple circuit to measure relative phase of audio tones, but
> >accurately than using scope patterns. Perhaps some sort of audio squarer
> >with phase comparator and meter output. Has anyone seen such a circuit?
> Elektor magazine published a "LF-phase-meter" in the June/1993 edition.
> simple yet quite accurate design. Basically the phase meter uses two Cmos
> IC's, a 4069U and a 4013, and a handfull of discrete components. The
> gadgetry in the design around the basic phase-meter consists of a 7106 3½
> digit DVM IC plus LCD display and a power supply. However, the basic
> phase-meter runs from a single 5V supply and current consumption is low
> enough to feed it from a 9V battery. As such it could be used as a add-on
> module for a standard (digital) multimeter (200mV range), or as an add-on
> for any piece of recording equipment.
> Published spec's are:
> f-range : 50Hz - 30kHz
> U-in : 10mV- 5Vrms
> U-max. : 50Vrms
> Z-in : ~300Kohm@100mV, ~200Kohm@10V
> Readout : 0-180°, 0-360° switchable
> Error : < 2°
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