Analog Electronics Simplified

Current mirror So before going to the band gap reference we learn what is current mirror? current mirror as the name suggest it analogous to simple mirror which reflect light from the one mirror to other it reflect the light in the similar fashion a current mirror reflect the current from the current source to other terminal. light analogy i think commit a mistake both transistor should be pnp  so what is ideal current mirror? ideal current mirror have infinite output resistance  and also  ideal current mirror is simply an ideal inverting current amplifier that reverses the current direction as well or it is a current-controlled current source (CCCS).ideally output current is input current and multiplied to the desired current gain value.furthermore ,the voltage between the input and common terminal is ideally zero because this condition allow entire supply voltage appear across the input current source also ideal  current source  should be independent of freque...