Asadi, Farzin2024-07-122024-07-1220231559-811X10.1007/978-3-031-25122-1_42-s2.0-85153064099https://doi.org/10.1007/978-3-031-25122-1_4https://hdl.handle.net/20.500.12415/7325Current source and differential pair are two important circuits with many applications. For instance, transistors inside of an Integrated Circuit (IC) are biased with the aid of current sources and input stage of an Op amp is a differential amplifier. This chapter studies important current source circuits and BJT based differential pair. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.eninfo:eu-repo/semantics/closedAccessIntegrated CircuitsOperational AmplifiersCurrent DifferentialCurrent InputCurrent Source CircuitCurrent SourcesDifferential PairsInput StagesOp AmpsDifferential AmplifiersBook Chapter98N/A87