http://www.ee.iitm.ac.in/vlsi/ 2026-05-14T10:46:48+00:00 http://www.ee.iitm.ac.in/vlsi/ http://www.ee.iitm.ac.in/vlsi/lib/tpl/zenlike/images/favicon.ico text/html 2010-12-24T10:35:19+00:00 http://www.ee.iitm.ac.in/vlsi/courses/ec330_2008/exp1?rev=1293186919&do=diff * Determine the current factor and the threshold voltage of nMOS and pMOS transistors in CD4069 by fixing VDS to Vcc/2 and varying VGS * Determine the IDS versus VDS for VGS=Vcc/2 * Determine Iout versus Vin of the inverter with Vout=Vcc/2 * You can use a separate power supply for generating the variable bias voltages or a resistive voltage divider(say, a chain of 16 identical resistors from Vcc to ground) * Use a 5V supply for CD 4069 * Be sure to disable the unused transistors by co… text/html 2010-12-24T10:35:19+00:00 http://www.ee.iitm.ac.in/vlsi/courses/ec330_2008/exp2?rev=1293186919&do=diff * Analyze the circuit in the figure below. Determine the waveforms VA and VB in steady state * Transistors are added to multiplex VA and VB and result in Vout. Implement this circuit using CD4069 inverters. Think carefully about which terminal goes where! You'll need to use separate ICs for the inverter and the rest of the circuitry because, on a chip, the supply and ground pins are all shorted together. You can use clock frequencies in the tens of kHz range, capacitors in the 10nF range, … text/html 2010-12-24T10:35:19+00:00 http://www.ee.iitm.ac.in/vlsi/courses/ec330_2008/exp3?rev=1293186919&do=diff Design the amplifier in (a) for a gain of -10. What is the expected 3dB bandwidth? Measure the bandwidth by sweeping the input sinewave frequency. Is there peaking(gain at some frequency higher than the dc gain) in the frequency response? Measure the step response by applying a low frequency square wave. Is there an overshoot? text/html 2010-12-24T10:35:19+00:00 http://www.ee.iitm.ac.in/vlsi/courses/ec330_2008/exp4?rev=1293186919&do=diff Design the gm-C filter shown above for a resonant frequency of 5kHz and a quality factor of 2. Determine the transfer functions between the input and V1 and V2. Build the filter using only transconductors and capacitors. i.e. the resistor and the positive transconductor should be realized using only the inverters available on a 4069. text/html 2010-12-24T10:35:19+00:00 http://www.ee.iitm.ac.in/vlsi/courses/ec330_2008/exp5?rev=1293186919&do=diff Determine the gain of the amplifier in (a) when the transconductance of the inverter tends to infinity. Build the amplifier in (a) with an ideal gain of 2 and R1 in 5kΩ to 10kΩ range. Use a 6V supply for this experiment. Measure the gain error. Connect inputs of unused inverters to ground text/html 2010-12-24T10:35:19+00:00 http://www.ee.iitm.ac.in/vlsi/courses/ec330_2008/exp6?rev=1293186919&do=diff * The circuit below can have inputs Vi1,R, Vi1,C, Vi2,R, Vi2,C, Vi3,R and output V1, V2, V3. Determine the transfer functions for all input-output combinations. * Which components do the resonance frequency and the quality factor depend on? * Which components do the zeros depend on? text/html 2010-12-24T10:35:19+00:00 http://www.ee.iitm.ac.in/vlsi/courses/ec330_2008/exp7?rev=1293186919&do=diff Oscillator An oscillator can be constructed using an integrator and a schmitt trigger in a feedback loop such that when the output of the integrator crosses the threshold of the schmitt trigger, the direction of integration is reversed. There are many oscillator topologies based on this principle and in this experiment you'll study one of them. text/html 2010-12-24T10:35:19+00:00 http://www.ee.iitm.ac.in/vlsi/courses/ec330_2008/exp8?rev=1293186919&do=diff A mixer is used for frequency conversion. For example, it is used in radio receivers to convert incoming signals at a high frequency to a lower intermediate frequency. And, in transmitters, it is used to convert low frequencies such as voice to high carrier frequencies. text/html 2010-12-24T10:35:19+00:00 http://www.ee.iitm.ac.in/vlsi/courses/ec330_2008/exp9?rev=1293186919&do=diff Carry out all analyses before coming to the lab * Use Vcc=9V; Ignore the additional bias resistor of 3R initially * Assuming an ideal opamp, and an ideal exponential transistor, determine the output Vout and the transistor current Ic in the circuit in (a-i). What is the range of Vin over which the circuit functions correctly? * Modeling the transistor with a transconductance gm, determine the small signal loop gain of the circuit. You can break the loop at the inverting input of the opa… text/html 2010-12-24T10:35:19+00:00 http://www.ee.iitm.ac.in/vlsi/courses/ec330_2008/exp10?rev=1293186919&do=diff Determine the output Vout as a function of V0,1,2,3. What function does it perform? Build the circuit and verify its function by connecting V0,1,2,3 to a dc voltage, one at a time. Use a 4 bit binary counter([74163]) or an up/down counter([74169]) outputs to drive V0,1,2,3 in the circuit above. What waveform will you get? Build and verify. (To use 74169 as a synchronous counter: PE'=1, CEP'=0, CET'=0; P0-3=0; CP: clock input; Outputs at Q0-3; U/D'=1 for counting upwards and 0 for counting do… text/html 2010-12-24T10:35:19+00:00 http://www.ee.iitm.ac.in/vlsi/courses/ec330_2008/project?rev=1293186919&do=diff A spectrum analyzer is useful for measuring the frequency content of a signal. If an oscilloscope plots v(t) versus t, a spectrum analyzer plots Sv(f) versus f where Sv(f) is the spectral density of v(t). In this project you'll build a simple spectrum analyzer. All the building blocks are familiar to you from previous experiments. text/html 2010-12-24T10:35:19+00:00 http://www.ee.iitm.ac.in/vlsi/courses/ec330_2008/start?rev=1293186919&do=diff Coordinators * Nagendra Krishnapura Schedule * Q slot(Tuesdays, 2-5pm) (except for the second week, when it will be held on Monday, 14 Jan.) Teaching assistants The TAs can be contacted at rollno at smail dot iitm dot ac dot in * Prashanth Jnanendra (ee07d003) * Amit Kumar Mittal (ee03b073) * Deepa Devendran (ee06s018) * Hari Prasath V (ee03b110) * Jayaraj Joseph (ee07d018) * Mohammad Kaifi (ee07s003) * Shaik Asif Basha (ee06m060) * Srinivasan G (ee03b105)