I'm working through some nice material from TI about comparators. This schematic is a simplified "innards" of a comparator. They refer to Constant Current Sources. But in LTSpice, a Constant Current Source seems to be a different thing: if I use a 1 amp current source across a 1Meg resistor, I get a million volts appearing in LTSpice. So these things seem not to be "sources" from what I understand, but limiters. Are the two ideas used interchangeably, or sometimes ambiguous? How would I simulate these in LTSpice? Just hook up one end of the current source to the 15V rail?
Thanks
Thanks