Re: ICL7611 op-amp (was: Motorola MC14081B)

2016-12-24 Thread Adrian Graham
On 24/12/2016 19:04, "Brent Hilpert" wrote: > On 2016-Dec-24, at 4:07 AM, Adrian Graham wrote: >> On 24/12/2016 03:48, "Brent Hilpert" wrote: >> >>> The ICL7611 is, I expect, a very-low-power (Intersil's niche) op amp. >>> Together >>> with the CMOS 4081

Re: ICL7611 op-amp (was: Motorola MC14081B)

2016-12-24 Thread Brent Hilpert
On 2016-Dec-24, at 4:07 AM, Adrian Graham wrote: > On 24/12/2016 03:48, "Brent Hilpert" wrote: > >> The ICL7611 is, I expect, a very-low-power (Intersil's niche) op amp. >> Together >> with the CMOS 4081 the circuit appears tailored for low-power operation. >> Is it supplied

RE: ICL7611 op-amp (was: Motorola MC14081B)

2016-12-24 Thread Dave Wade
> -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Adrian > Graham > Sent: 24 December 2016 12:09 > To: General Discussion: On-Topic and Off-Topic Posts > <cctalk@classiccmp.org> > Subject: Re: ICL7611 op-amp (was: Motor

Re: ICL7611 op-amp (was: Motorola MC14081B)

2016-12-24 Thread Adrian Graham
On 24/12/2016 04:34, "Glen Slick" wrote: > On Fri, Dec 23, 2016 at 7:48 PM, Brent Hilpert wrote: >> >> The op amp is configured as a schmitt trigger or comparator with hysteresis: >> There is no negative feedback so it is operating at full gain

Re: ICL7611 op-amp (was: Motorola MC14081B)

2016-12-24 Thread Adrian Graham
On 24/12/2016 03:48, "Brent Hilpert" wrote: >> On a whim I managed to solder new legs onto the old LM385Z and it works, >> giving 1.2V at IN-, but the output is still only 0.2V. >> >> I don't mind admitting I'm stumped :) > > > The op amp is configured as a schmitt trigger

Re: ICL7611 op-amp (was: Motorola MC14081B)

2016-12-23 Thread Glen Slick
On Fri, Dec 23, 2016 at 7:48 PM, Brent Hilpert wrote: > > The op amp is configured as a schmitt trigger or comparator with hysteresis: > There is no negative feedback so it is operating at full gain and > functions like a comparator. > However there is positive

Re: ICL7611 op-amp (was: Motorola MC14081B)

2016-12-23 Thread Brent Hilpert
On 2016-Dec-23, at 4:52 PM, Adrian Graham wrote: > > Thanks for all the help so far, I've moved on quite a way but I still > haven't managed to get my head around op-amps other than the basics. If I > may trouble your experienced heads with a small circuit diagram: > >

ICL7611 op-amp (was: Motorola MC14081B)

2016-12-23 Thread Adrian Graham
Hi folks, Thanks for all the help so far, I've moved on quite a way but I still haven't managed to get my head around op-amps other than the basics. If I may trouble your experienced heads with a small circuit diagram: http://www.binarydinosaurs.co.uk/STCExecutelStartupCircuit.jpg This is the

Re: Motorola MC14081B

2016-12-22 Thread Adrian Graham
On 21/12/2016 03:23, "allison" wrote: >> If one of the other outputs is driving a CMOS device the output may >> not go high enough to satisfy it, however I would expect the reset >> input on the 8085A to be TTL compatible. > The 8085 reset input is not TTL, its schmidt

Re: Motorola MC14081B

2016-12-22 Thread Adrian Graham
On 21/12/2016 00:58, "Paul Berger" wrote: > On 2016-12-20 8:50 PM, Adrian Graham wrote: >> Evening folks, >> >> (it's evening here) >> >> Typically for troubleshooting around $FESTIVAL I find a more-than-likely >> dead MC14081B (CMOS quad dual-input AND gates) just as UK

Re: Motorola MC14081B

2016-12-20 Thread allison
On 12/20/2016 07:58 PM, Paul Berger wrote: > On 2016-12-20 8:50 PM, Adrian Graham wrote: >> Evening folks, >> >> (it's evening here) >> >> Typically for troubleshooting around $FESTIVAL I find a more-than-likely >> dead MC14081B (CMOS quad dual-input AND gates) just as UK postage >> ends for >>

Re: Motorola MC14081B

2016-12-20 Thread Eric Smith
On Tue, Dec 20, 2016 at 5:58 PM, Paul Berger wrote: > (I might have a CD4081B somewhere too, which is pin compatible according to > >> the datasheet) >> > Same component Motorola prefixed their 4000 series CMOS numbers with a 1 > to be different. > To be fair, it wasn't just

Re: Motorola MC14081B

2016-12-20 Thread Paul Berger
On 2016-12-20 8:50 PM, Adrian Graham wrote: Evening folks, (it's evening here) Typically for troubleshooting around $FESTIVAL I find a more-than-likely dead MC14081B (CMOS quad dual-input AND gates) just as UK postage ends for the next few days so getting a replacement won't happen until next

Motorola MC14081B

2016-12-20 Thread Adrian Graham
Evening folks, (it's evening here) Typically for troubleshooting around $FESTIVAL I find a more-than-likely dead MC14081B (CMOS quad dual-input AND gates) just as UK postage ends for the next few days so getting a replacement won't happen until next week. Question is, aside from having to make