why does this pull my Vin to ground at the inverting input (Vin = 1V, voltmeter reading at inverting input = 0V).
but this doesn't (Vin = 1V, voltmeter reading at inverting input = 1V).
Rich (BB code):
------------------
| |\ |
| | \ |
Vin --+-----|- \ |
| \----+
| /
-----|+ /
| | /
| |/
gnd
Rich (BB code):
1k
-------/\/\/\-----
| |
| |\ |
1k | | \ |
Vin ---/\/\/\--+------|- \ |
| \----+
| /
------|+ /
| | /
| |/
gnd