<p>Faculty of Information Engineering & Technology Electrical & Electronics Department Ali Ahmed Course: Advanced Microelectronics Lab ELCT905 Dr. Eman A. Soliman</p><p>ADVANCED MICROELECTRONIC</p><p>LAB 1 </p><p>(REPORT) </p><p>Your name: </p><p>Your class: </p><p>The date: </p><p>Grade: /10</p><p>1 CMOS Operational Transconductors (OTA)</p><p>CMOS Transconductor Types:</p><p>I. Single Input Single Output Transconductors</p><p>A. CMOS Composite Transistor</p><p>1. Region of operation</p><p>2. Circuit Simulation</p><p>II. Differential Input-Single Output Transconductor</p><p>A. Differential pair as a voltage to current converter</p><p>1. Region of operation</p><p>2. Circuit Simulation</p><p>B. Differential pair with degeneration resistor</p><p>1. Circuit Simulation</p><p>Conclusion:</p><p>Performance comparison table</p><p>2 I. Single Input Single Output Transconductors</p><p>A. CMOS Composite Transistor:</p><p>VDD</p><p>VC M1</p><p>I1</p><p>M2 Iout</p><p>Vin</p><p>M3 I2</p><p>- VC M4</p><p>VSS</p><p>Figure 1 CMOS realization for Single Input Single Output Transconductor 1. Define the region of operation for each transistor:</p><p>< Vin < (On)</p><p>< Vin < (Sat)</p><p>2. Circuit Simulation:</p><p>Using Cadence with 90nm model and ±1.2V supply voltages with the aspect ratios for the transistors given below for the circuit shown in Fig.1, evaluate the following simulations; If applicable compare also the achieved results with the theoretical values:</p><p>M1- M3 M2-M4 VC 180nm/990nm 2µm/900nm 0.8 3  Circuit schematic on Virtuoso</p><p> a) Iout-Vin DC characteristic and its derivative Gm for a load of 1kΩ (comment on the </p><p> linearity range) </p><p>4 b) Vary Vc from (0.6V to 1V) for a load of 1kΩ and sketch Gm </p><p> c) Frequency response for Vin =1V ac while driving a load of 20 pF in parallel with </p><p>100kΩ.</p><p>5 d) The output current transient response to a 1MHz sinusoidal input voltage with </p><p> amplitude 0.1V (at 1Ω//1pF load)</p><p> e) The output current transient response to a 1MHz square wave input voltage with </p><p> amplitude 0.1V (at 1Ω//1pF load)</p><p>6 II. Differential Input-Single Output Transconductor</p><p>A. Differential pair as a voltage to current converter:</p><p>0.6V</p><p>M6 M5</p><p>Iout</p><p>M1 M2</p><p> vid + - 7KΩ</p><p>M3 M4</p><p>-0.6V</p><p>Figure 2 CMOS realization for Differential Input Single Output Transconductor 1. Define the region of operation:</p><p>< Vid <</p><p>2. Circuit Simulation:</p><p>Using Cadence with 90nm model and ±0.6V supply voltages with the aspect ratios for the transistors given below for the circuit shown in Fig.2, evaluate the following simulations</p><p>M1-M2 M3-M4 M5-M6 40μm /0.9μm 20μm /0.36μm 10μm /0.36μm 7  Circuit Schematic on Virtuoso</p><p> a) Iout-Vid DC characteristic and its derivative Gm for a load of 1kΩ (comment on the </p><p> linearity range) </p><p>8 b) Frequency response for Vid =1V ac while driving a load of 100kΩ//1pF</p><p>B. Differential pair with source degeneration:</p><p>1. Add a source degeneration resistance with value 1kΩ to the circuit in the last </p><p> example, then evaluate the following simulations:</p><p> Circuit Schematic on Virtuoso</p><p>9 a) Iout-Vin DC characteristic and its derivative Gm for a load of 1kΩ (comment on the </p><p> linearity range) </p><p> b) Repeat the last simulation for different values of the source degeneration </p><p> resistance; comment on the result</p><p>10 Home Assignment</p><p>Complete the output stage of the OPAMP u designed in</p><p>Microelectronics course. Plot the frequency response and mark the gain value and bandwidth.</p><p>NOTE: It’s important to have a complete and functional</p><p>OPAMP as it will be used in later sessions!!</p><p>11</p>