In this technique, the circuit is designed in such a way that it copies the current through one active device to another active device with current control feature. In this, the current is flowing through one device can be copied into another device but in inverting form. My short answer is that a CMOS current mirror is not too frequently used at all, compared to NMOS or PMOS current mirrors. -Define drain current -Distribute overdrive voltage-Calculate the aspect ratio-Calculate the gain with Lmin-Iteration by increasing W,L until achieving gain criterion-Finally, DC bias voltage setup and exam residual goals - CMFB is necessary PMOS>Cascode_N>Input_N Consider the following circuit in two phases, Assume that M3 and M2 are at a 1:1 ratio. The bias voltage for M1 Vb is chosen to allow for 100uA. You are calling this load Ibias in your second schematic. 6.3 Advanced current mirrors: wide-swing In most applications, it is desirable to make (W/L)5 smaller than that given in the Figure so that Q2 and Q3 can be biased with a slightly larger V ds. Without doubt, my answer could be challenged technically. To save power consumption, I bias

A current mirror is a circuit block which functions to produce a copy of the current flowing into or out of an input terminal by replicating the current in an output terminal.

The second is a current mirror as you say. 4.2.1) Cascode Current Mirror(Cont) Example 10.9 4.2.1) Cascode Current Mirror(Cont) Obj ectiv : C om p ar ethu si nc f cascode MOSFET current mirror (CMCM) to that of the two-transistor MOSFET current mirror (2TMCM). Cascode current mirrors Up: MOS current mirrors Previous: Current mirror with channel . Figure 4.3 shows a current mirror loaded by resistance R L at the output. 4/25/2011 The MOSFET Current Mirror 6/6 We can also use PMOS devices to construct a current mirror!

For I use both NMOS and PMOS to generate sink and source current. SS V SS R L I L + V GS2 - V Rref I + V GS1 - This better be in … This would help counter the body effect of Q1 an Q4, which have their V t increased. I'm being having a lot of trouble fully grasping the interaction between NMOS and PMOS current sources. Small signal analysis of the MOS current mirror. Is my understanding below correct? The first, assuming well-match transistors, is merely a way to control two different current sources to the same value. Consider the 2TMCM in Figure 10.17 and the CMCM in Figure 10.18.

The Current Mirror is a widely popular technique for monolithic IC design. The purpose of that is to have the current source produce the same current ("mirror") as the current drawn by a load. When there is a current input, there is a current output, which is the exactly mirror or multiple of the input current. However, my explanation (or justification) is given below. The corresponding small signal equivalent diagram is also shown in the Figure. PMOS Current Mirror. Ask Question Asked 4 months ago. The ZDS1009 current mirror has been developed specifically for high side, current sense plus level translation applications and as such will find a broad applications base including battery charge management, DC motor control and over current monitoring functions. An important feature of the current mirror is a relatively high output resistance which helps to keep the output current … FET Current and Voltage Sources and Current Mirrors The Building Blocks of Analog Circuits -IV In this lecture you will learn: • Current and voltage sources using FETs • FET current mirrors • Cascodecurrent mirror • Double Wilson current mirror • Active biasing schemes ECE 315 –Spring 2007 –Farhan Rana –Cornell University Motivation The amplitude of the current is micro A and the duration of the pulse is micro sec , so I think it might be some special requests for the discrete MOSFET.