Discrete Op-Amp

opamp questions:

– why matching input stage transistors.

– advantages/disadvantages to pnp/npn.

– is most the noise from the input stage.

– how to get rail to rail output.

– what affects unity gain stability.

– what affects gain linearity.

– where does the distortion mostly come.

– advantage to high hfe in input.

– what affects max voltage.

– what is best type of current mirror.

– what affects slew rate.

opamp design:

simulate:

– do a 990 layout with the that input chip.

– try number of stage config.

– try an API alike.

breadboard:

– any simulations that work.

layout:

990 Style

Tryout:

try the opamps in the sontec and nseq, and mic pre.