Design a piece of test equipment to analyze a repetitive pulse train input signal and compute the frequency and the pulse width as analog output signals.
Specifications:
The output voltage corresponding to the input frequency shall be defined as V1.
The output voltage corresponding to the input pulse width shall be defined as V2.
V1 shall have a range of -80mV to -8V+-0.8V, corresponding to an input frequency FREQ of 90Hz to 9KHz.
V2 shall have a range of 100mV+-10mV to 10V+-1V, corresponding to an input pulse width PW of 80Ξs to 8ms.
At higher frequencies, PW range is limited by
PW_(max)=PERIOD-PW_(min)
Other input signal characteristics:
Vinit =0V
Vpulse =-5V
Tr and Tf shall be each less than 10% of the pulse width
Source signal can be modulated by a baseband signal with a 0.9Hz bandwidth
ACCURACY: The accuracy of V1 and V2 shall be better than +-10%, but a maximum error of 25% shall be allowed at one point providing that the average is below 10%.
The error shall be defined as
%E=(V_(actual )-V_(ideal ))/(V_(ideal ))100%
PRECISION: The maximum output ripple allowed shall be 20%, defined by
RIPPLE=(V_(max )-V_(min))/(V_(average ))100%
Resources available:
OPAMPS, diodes, transistors, resistors, capacitors, +-15V power supply, potentiometers, and simple logic gates: AND/OR/XOR/INV/NAND/NOR/XNOR. NOTE: potentiometers cannot be adjusted during the testing or qualification process.
DELIVERABLES:
Circuit prototype to be inspected by instructor. Inspection qualification sessions will be arranged toward the end of the semester.
Report that will include at a minimum:
a. Front matter
b. Introduction
c. Problem Description
d. MATLAB Solution Presentation
e. Design equations derivation and acquisition
f. Design synthesis
g. Design simulations in Spice
h. Test data presentation and analysis including:
i. Minimum of 9 data points per decade of measured parameter range
ii. Plots of simulation results and actual data
iii. Accuracy and precision analyses and statistics: RMS error and error standard deviation
i. Conclusions, including a narrative on the sources of deviation of the results from the theoretical expectations