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 the circuit appears tailored for low-pow
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 by the battery?
>> I
> -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
>
> Subject: Re: ICL7611 op-amp (was: Motorola MC14081B)
>
> On 24
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 and
>> functions like a comparator.
>>
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 or comparator with h
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 feedback via R412 (
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:
>
> http://www.binarydinosaurs.
