Question

Notify Me Bookmark

Consider a digital system of a million (10^6) CMOS gates that flip state every 10^3 cycles on average. Assume that Vdd = 1.5 V and gate capacitance = 250 pF. a) Determine the total dynamic power consumed by the circuit when operated at at a clock rate of 1GHz. b) Repeat part a) assuming a frequency of 500 MHz and no change in the operating voltage. c) Repeat part b) assuming that due to the lower frequency the voltage has been sealed down to 0.75 V.

Consider a digital system of a million (10^6) CMOS gates that flip state every 10^3 cycles on average. Assume that Vdd = 1.5 V and gate capacitance = 250 pF. a) Determine the total dynamic power consumed by the circuit when operated at at a clock rate of 1GHz. b) Repeat part a) assuming a frequency of 500 MHz and no change in the operating voltage. c) Repeat part b) assuming that due to the lower frequency the voltage has been sealed down to 0.75 V.

Image text
Consider a digital system of a million (10^6) CMOS gates that flip state every 10^3 cycles on average. Assume that Vdd = 1.5 V and gate capacitance = 250 pF. a) Determine the total dynamic power consumed by the circuit when operated at at a clock rate of 1GHz. b) Repeat part a) assuming a frequency of 500 MHz and no change in the operating voltage. c) Repeat part b) assuming that due to the lower frequency the voltage has been sealed down to 0.75 V.

Detailed Answer

1 0

Please enter your email here. You will get email when this question is answered by our tutor.

Answer
Doubtrix Logo

This Problem has been solved!

You'll get a detailed, step-by-step and expert verified solution.

Join Doubtrix with 7-days free trial

  • Icon Correct & Verified Answers
  • Icon No AI-Generated Answers
  • Icon Video Solution for Difficult Questions
  • Icon Work With Experts to Reach at Correct Answers
Login Sign Up
  • Student Reviews:
  • (1)

Similar/Related Questions

Calculate the switching power consumed by the static complementary CMOS circuit shown, assuming that all significant capacitances have been lumped into the three capacitors shown in the figure, where CL = 0.2 pF. Assume that VDD = 1.5 V and clock frequency is f = 400 MHz. The distribution of input signals is as follows: PA = 0.3, PB = 0.4, PC = 0.6, PD = 0.5.
Solution
0 0

Consider the following circuit Inverter timing: Propagation delay tp = 20 pS Flip-Flop timing: Setup time tsu = 30 pS Hold time thold = 10 ps Clock-to-Q delay tclk- = 50 pS Assume the CLK signal has a square waveform with 50% duty cycle. a. Draw the waveforms of signals CLK, D, and Q for 4 clock cycles. b. What is the ratio between the oscillation frequency of the signals CLK and Q ? c. For this circuit to operate correctly, determine the maximum CLK frequency based on the given timing characteristics of the flip-flop and the inverter. d. Would a hold time violation occur on the flip-flop at any CLK frequency? Why or why not? e. If this circuit dissipates 100 Micro-Watts when operating at Vdd = 2.5 Volts and CLK frequency of 1 GHz, estimate the power dissipation of the circuit when operating at Vdd = 1.25 V and CLK frequency of 100 MHz. Assume the power dissipation is dominated by the switching (dynamic) power. (1 GHz = 109 Hz and 1 MHz = 106 Hz)
Solution
0 0

Consider the shown circuit, where R = 500 Ω, L = 40 μH, C = 30 nF, and Vs is a sinusoidal source with a peak amplitude of 5 V. (Vs(t) = 5 cos⁡(ωt)V) Part 1: Hand Calculation a) Assume the source has a frequency of 140 kHz, calculate: the impedance Z seen by the source (expressed as a complex number and as magnitude/phase). Is the impedance capacitive or inductive? the source current Is. (Expressed as a Phasor and as a time function)the voltage Vo (Expressed as a Phasor and as a time function) b) Repeat part (a) at a frequency of 148 kHz c) Calculate the resonant frequency of the circuit (the frequency at which the reactive components cancel each other) d) find the impedance of the circuit at the resonant frequency e) Calculate the Quality factor and the 3-dB bandwidth of the circuit. Note that the resonator (LC circuit) is parallel Part 2: Simulation Draw the circuit on LTSpice a) Perform AC analysis (from 130 kHz to 170 kHz, use linear scale with 10000 points) and plot the following on a separate plot: The voltage (Vo)The current (Is)The impedance seen by the source b) From the plots verify your results in the hand calculation for parts (a) and (b) c) from the plots find the resonant frequency d) From the voltage plot, find the 3-dB bandwidth. Notes: The default Y-scale for AC analysis in LTSpice is dB, you can change it to linear To plot the impedance, add a trace and plot the expression of V over I Homework submission is through the Moodle platform Submit a single compressed file containing: The hand calculations Screenshot showing the circuit and the simulation results The schematic file (.asc)The netlist file (.net)

Solution
0 0