Jun 15, 2014 #1 A abhingd Newbie level 3 Joined Jun 7, 2014 Messages 4 Helped 0 Reputation 0 Reaction score 0 Trophy points 1 Activity points 24 how we change 4.2KΩ register in current mirror by using CMOS ?
Jun 16, 2014 #2 S SIDDHARTHA HAZRA Advanced Member level 4 Joined Oct 15, 2012 Messages 102 Helped 68 Reputation 136 Reaction score 68 Trophy points 1,308 Location India Activity points 2,176 abhingd said: how we change 4.2KΩ register in current mirror by using CMOS ? Click to expand... Current mirrors are used to generate current sources and current sinks of desired values. How can a resistor be a current source/sink ? It is a passive element. Please clarify your question ?
abhingd said: how we change 4.2KΩ register in current mirror by using CMOS ? Click to expand... Current mirrors are used to generate current sources and current sinks of desired values. How can a resistor be a current source/sink ? It is a passive element. Please clarify your question ?
Jun 16, 2014 #3 T tompham Full Member level 2 Joined May 29, 2010 Messages 133 Helped 29 Reputation 60 Reaction score 29 Trophy points 1,308 Location usa Activity points 2,066 Hi abhingd You mean replace 4.2k ohm resister by mos? R = L / k*W(Vgs -Vt - Vds) k = Un*Cox (Up*Cox) Vds = VR = I*R To find vgs choose vgs such that Vds < vgs -Vt Finally find W/L from formula above
Hi abhingd You mean replace 4.2k ohm resister by mos? R = L / k*W(Vgs -Vt - Vds) k = Un*Cox (Up*Cox) Vds = VR = I*R To find vgs choose vgs such that Vds < vgs -Vt Finally find W/L from formula above