J
jiangwp
Guest
When a op amplifier is designed, some problems are appeared.
For a differential op,
1.the input differential pair determines the input transcondutance ,input
common mode range and referred input noise;
2.the common bias current source determines the input transcondutance , slew
rate ,input common mode range and CMRR;
But for the active load, i know only the gain is related it.
in fact, the gain is related load transistor length (L), what determined active load tansistor width?
Maybe , the active load does effect in the IMR or output swing.
what else effects about the active load transistors and how to designed its size?
For a differential op,
1.the input differential pair determines the input transcondutance ,input
common mode range and referred input noise;
2.the common bias current source determines the input transcondutance , slew
rate ,input common mode range and CMRR;
But for the active load, i know only the gain is related it.
in fact, the gain is related load transistor length (L), what determined active load tansistor width?
Maybe , the active load does effect in the IMR or output swing.
what else effects about the active load transistors and how to designed its size?