Hi David, Silly question, where is the output. TP18 ??? RP On 29 September 2016 at 10:55, Van Horn, David wrote: > Like this > > -----Original Message----- > From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf = Of Jason White > Sent: Wednesday, September 28, 2016 11:25 AM > To: Microcontroller discussion list - Public. > Subject: Re: [EE] Long tailed pair, sort of. > > Just out of curiosity, could you post a schematic? It might help to see = it in context. > > On Wed, Sep 28, 2016 at 10:02 AM, Van Horn, David < david.vanhorn@backcou= ntryaccess.com> wrote: > >> Possible. I googled that and didn't see anything other than >> differentials though, with one collector tied high. >> It's an odd configuration. >> >> -----Original Message----- >> From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On >> Behalf Of Sean Breheny >> Sent: Thursday, September 22, 2016 5:44 PM >> To: Microcontroller discussion list - Public. >> Subject: Re: [EE] Long tailed pair, sort of. >> >> Could it be a two-input inverting summing amplifier? It is too >> symmetrical to be a differential amplifier. >> >> On Tue, Sep 20, 2016 at 12:27 AM, David VanHorn >> wrote: >> >> > It's supposed to be a differential amplifier, but I don't think it's >> right. >> > >> > On Mon, Sep 19, 2016 at 9:30 PM, Jean-Paul Louis >> wrote: >> > >> > > NAND gate using RTL logic? >> > > >> > > Jean-Paul >> > > N1JPL >> > > >> > > >> > > > On Sep 19, 2016, at 6:07 PM, Van Horn, David > > > backcountryaccess.com> wrote: >> > > > >> > > > I am looking at an amplifier, which is almost a classic long >> > > > tailed >> > pair >> > > as figure 2 here: >> > > https://en.wikipedia.org/wiki/Differential_amplifier >> > > > >> > > > The difference is that there is only one collector resistor, and >> > > > both >> > > collectors are tied together. >> > > > What's up with that? >> > > > >> > > > I haven't seen that configuration in Horowitz and Hill or Ghausi. >> > > > >> > > > >> > > > -- >> > > > David VanHorn >> > > > Lead Hardware Engineer >> > > > >> > > > Backcountry Access, Inc. >> > > > 2820 Wilderness Pl, Unit H >> > > > Boulder, CO 80301 USA >> > > > phone: 303-417-1345 x110 >> > > > email: david.vanhorn@backcountryaccess.com> > > backcountryaccess.com> >> > > > >> > > > -- >> > > > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive >> > > > View/change your membership options at >> > > > http://mailman.mit.edu/mailman/listinfo/piclist >> > > >> > > >> > > >> > > Just my $0.02, >> > > >> > > Jean-Paul >> > > N1JPL >> > > >> > > >> > > >> > > >> > > -- >> > > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive >> > > View/change your membership options at >> > > http://mailman.mit.edu/mailman/listinfo/piclist >> > > >> > -- >> > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive >> > View/change your membership options at >> > http://mailman.mit.edu/mailman/listinfo/piclist >> > >> -- >> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive >> View/change your membership options at http://mailman.mit.edu/ >> mailman/listinfo/piclist >> >> -- >> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive >> View/change your membership options at >> http://mailman.mit.edu/mailman/listinfo/piclist >> > > > > -- > Jason White > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/cha= nge your membership options at http://mailman.mit.edu/mailman/listinfo/picl= ist > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .