* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Guided exercise 3: Analysis and design of current reference circuits
Switched-mode power supply wikipedia , lookup
Printed circuit board wikipedia , lookup
Ground (electricity) wikipedia , lookup
Buck converter wikipedia , lookup
Electronic musical instrument wikipedia , lookup
Current source wikipedia , lookup
Alternating current wikipedia , lookup
Mains electricity wikipedia , lookup
Electrical substation wikipedia , lookup
Regenerative circuit wikipedia , lookup
Surge protector wikipedia , lookup
Opto-isolator wikipedia , lookup
Resistive opto-isolator wikipedia , lookup
Electronic engineering wikipedia , lookup
Earthing system wikipedia , lookup
Circuit breaker wikipedia , lookup
Transmission tower wikipedia , lookup
Two-port network wikipedia , lookup
Non-guided exercises 2: Analysis and simulation of beta multiplier current reference circuits Exercise 2.1: Consider the circuits shown in Fig.2.1 and Fig.2.2. Fig.2.1. Beta multiplier referenced circuit. Fig.2.2. Beta multiplier referenced circuit with cascode. Given that: µnCox=100 µA/V2, VTN0=0.5V, µpCox=40 µA/V2, VTP0=-0.6V, 0.35µm CMOS technology Problems: A. Indicate the type of circuits. B. Calculate the value of the current references. C. Simulate the circuits and plot Iref=f(VDD) characteristics. Compare the simulated and calculated values of the Iref and explain the causes for the differences. D. Estimate graphically the minimum operating supply voltage VDDmin and sensitivity of the Iref to the VDD. E. Simulate the circuits and plot Iref=f(T) characteristics. F. Estimate graphically the temperature coefficient of Iref. G. Compare and present in tabular form the parameters of the circuits. Exercise 2.2: Consider the circuits shown in Fig.2.3. Given that: µnCox=100 µA/V2, VTN0=0.5V, µpCox=40 µA/V2, VTP0=-0.6V, 0.35µm CMOS technology Fig.2.3. Beta multiplier referenced circuit. Problems: A. Compare the circuit in Fig.2.2 and the circuit in Fig.2.3. Indicate the type of circuits. B. Calculate the value of the current references. C. Simulate the circuit and plot Iref=f(VDD) characteristic. Compare the simulated and calculated values of the Iref and explain the causes for the differences. D. Estimate graphically the minimum operating supply voltage VDDmin and sensitivity of the Iref to the VDD. E. Simulate the circuit and plot Iref=f(T) characteristic. F. Estimate graphically the temperature coefficient of Iref. G. Compare and present in tabular form the parameters of the circuits in Fig.2.2 and Fig.2.3. 1