🚀 go-pugleaf

In article <1993Jan10.052336.9972@ssc.com>, markz@ssc.com (Mark Zenier) writes:
|> Paul Michael Wayner (pmw2c@csissun10.ee.Virginia.EDU) wrote:
|> : I'm interested in designing a circuit that will determine
|> : if a sine wave frequency is in a certain range of values,
|> : specifically, 45-51 MHz.  It is very important that the
|> : detector be as reliable a possible, so I would like to use
|> : only a few active components and try to stick to RC's as
|> : much a possible.
|> 
|> (At that frequency, every wire is an inductor, whether you 
|> want it to be or not.)

All too true.

|> 
|> How sensitive?  And is the input an antenna or a high level
|> signal?  A low level signal?   What kind of noise or
|> interference?  More than one signal at a time?  Fixed or
|> Variable frequency?  Is the output an on/off digital signal, or
|> a amplitude, a blinking light, a spectrum display, etc. ...
|> 
|> [In other words, your spec. is a little vague.]
|> 
|> Mark Zenier  markz@ssc.wa.com  
|> 

Excellent questions! I apologize for not being more specific.
The input is a 5 Vpp signal on a PCB.  Noise and interference
minimal.  Only one signal, fixed frequency, with a on/off 
digital output.

					Paul Wayner