At 07:45 PM 1/2/2007, John Miles wrote: >The SA604AD is a favorite of mine, if you need a good IF strip with a >quadrature detector.
Have to agree. Only ever used them in three designs but two of them went into quite high volume back in the late-80's/early-90's and they were never a problem. To be honest, I had forgotten about them. We moved from the MC1357 to the NE604 (as it was then) and then to DSP for FM demodulation. John > You can still get MC1350Ps from Jameco, but the 1357 >is relatively rare (except, as John points out, as an NTE replacement.) > >-- john, KE5FX > > > -----Original Message----- > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > > Behalf Of John Day > > Sent: Tuesday, January 02, 2007 4:40 PM > > To: Discussion of precise time and frequency measurement > > Subject: Re: [time-nuts] Loran-C ICs > > > > > > Funny you should ask, we had to get some of these to replenish spares > > stock in a client site for some gear we built YEARS ago. The MC1357P > > is available as the NTE708 (around $7.25 each it seems) and the > > MC1350P is an NTE746. The next generation of that design (the MC1350P > > as okay in TV's, but really not a lot of good elsewhere) used some > > VGA chips from Analog Devices, AD6xx series, but I cannot recall > > which. Possibly AD602. We used one of the AD log detectors, possibly > > like an AD8302 to complete the AGC loop. In another design we had the > > FM demodulator in an FPGA and we recovered amplitude information > > after the ADC to close the AGC loop - we need not have rapidly > > varying signals, and then used another small 10 bit ADC to control > > the IF amp chip. > > > > John > > _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
