NAND gate using RTL logic? Jean-Paul N1JPL > On Sep 19, 2016, at 6:07 PM, Van Horn, David wrote: >=20 > 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 >=20 > The difference is that there is only one collector resistor, and both col= lectors are tied together. > What's up with that? >=20 > I haven't seen that configuration in Horowitz and Hill or Ghausi. >=20 >=20 > -- > David VanHorn > Lead Hardware Engineer >=20 > Backcountry Access, Inc. > 2820 Wilderness Pl, Unit H > Boulder, CO 80301 USA > phone: 303-417-1345 x110 > email: david.vanhorn@backcountryaccess.com >=20 > --=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 Just my $0.02, Jean-Paul N1JPL --=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 .