Q.10 A temperature sensor has an output voltage range of 0-1 V that corresponds linearly to a temperature range of 0 to

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Q 10 A Temperature Sensor Has An Output Voltage Range Of 0 1 V That Corresponds Linearly To A Temperature Range Of 0 To 1 (107.58 KiB) Viewed 18 times

Q.10 A temperature sensor has an output voltage range of 0-1 V that corresponds linearly to a temperature range of 0 to 100 °C. You are tasked to design a circuit that will output logic high when the temperature is within the safe range, i.e. 30-70 °C. You may assume VTH,NMos=|VTH,PMOS] =0.2V, 14,Cox=2.5ųCox=100ŅA/V?, and Vpp=1V. (a) Without using any comparator and using only digital logic, design a circuit that can achieve the goal. [8 marks) (b) Due to the process variation, the threshold voltage can vary by +20%. Describe the impact on your design in (a) and which threshold voltage variation is considered acceptable. [6 marks) (c) The logic high output from (a) is driving an inverter with Cg and Cp of 10ff and 1fF respectively. This inverter output will eventually drive a capacitive load of 10pF. Based on super buffer design, write down two equations that involves the optimum number of stage (N) and the scaling factor (a) to achieve the minimum delay time. Your equations should only have N and a as the variable. [6 marks