This paper proposes new current mirror layout strategies which are being designed using 180nm technologies using cadence virtuoso layout software. The performances of circuit is also being analysed in L edit window by varying input current and input voltages values or by changing arrangement of N- Type-Mosfet. Simulation results show a significant improvement in matching characteristics of the proposed structures over what is achievable with existing layout techniques in demanding applications.
Current mirrors are special circuits which are being used in IC (integrated circuit) technology. The mirrors circuit generally consists of two transistors while third or other one can consist of FETs which can be used in these types of circuits to enhance performance. Current mirror copies or gains the name because it copies the current flowing in the circuit with output current being constant. Actually we can say that current mirros are types of the current controlled current source circuits. The current mirror is used to provide biasing current and active loads of circuit.
II. DIFFERENT CURRENT MIRRORS AND THEIR LAYOUTS
A. Simple Current Mirror
Current Mirrors are subject of innovation and low voltage current mirros are being possible by use of bipolar technology.Simple current mirror is shown in figure which is commonly used and also being well known for it’s inaccuracy by having sammer values of β. The ratio of output current I2 to input current I1 of the simple current mirror 2 is given by β, where β is the current gain of the transistors.
B. Cascode Current Mirror
There is a cascode current mirror device that can produce an output current that is a direct function of the input current it receives. At least two parts are connected in a cascode fashion in the cascode current mirror. Additionally, a connection for feedback is built between those components. For instance, a buffering connection might be this feedback connection. This device produces voltage signals that can be utilised to drive and regulate further output stages. Such additional output stages have the ability to provide more output current.
 Solid-State Electronics Volume 46, Issue 2, February 2002, Pages 307–312
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