I. You need to make a series of amplifiers with a range of positive and negative (investing) gains. from -100 to 100. You have an op-amp with ankle liz available. so you decide that this will be the basis of each Miele co-arno design.
The amplifiers you need to make. have cloecd-loop gains (G) of : '100, '10. I. -1, -10. and -
Fill in the table below to show your designs: (a) Find the resistor ratio for each amplifier gain (for the Mewling amplifier, use the esaveation that Rr RI and Rs = R2 so that Rt k always the feedback resistor between v. and v. in the amplifier configuration) (b) Find the -3d8 frequency, f„ of each of your designs (c) Sketch the frequency response for one of your designs, the amplifier with O — -100 V.V. using a scmi-log plot of 1.4181 vs. log.f(kilz)
Ri/R: 100 10
-10
- Design an attlys I I igh-Przo: filter with the following characteristics: - Gain of 20dlili Id13 - Cutoff frequency of 2 kllz s 50 I lz - Roll-off rate of 40 dB/decade
Simulate the circuit in Multisim to verify that your design works properly. - hint the circuit and AC Analysis (or AC Sweep) to show that it works (include Magnitude value. at high frequency (50k11z)and at the cutoff frequency Hint I: You will need two HP filters in series (to provide the 40d8/decade roll off). But the Ol'ER4LL cutoff frequency is NOT equal to the cutolffrequency
of each wage! To find that, von need to rossnrurt she overall transfer function using identical high-pass fibers and set the magnitude = 0. V'
Bins 3: Another approach. remember that in dB. the magnitudes of each stage add. so the frequency n here she magnitude of a single stage is 4.5 dB kill give the dB palm Jor the :Corder litter
- Hand-Pare Filter lksign a. Design an ache first-order Low-Pass filter that has the follow ing characteristics: - Cut-off frequency of 20 kHz • Input Impedance — lkfl Cain of-111 VN b. Dciign an octise fast-order Ha-Paso rater w ith the folkthing charanaila - Cut-off frequency of 10 kllz ' Rs = ILO Cain of ID vN c. Combine your LOM toss Design and High-Pass design to form a Band-Pass liter and so that the input impedance remains I kl) -Sketch the circuit including vulva for each component. & Calculate nsa and No for your handrytsa design c. Simulate the circuit in Sfultisim and petform an AC Sweep limn 1 Kffi 100 kHz. a. Pkoze a cuthor at in. and verify yen values for as, and M. b. From your AC sweep. find wet and toc. f. Calculate the Quality HICkW. Q
Pnnt the circuit aid A(' Analysis (or A(' Sweep) from I kHz 101) k I i7 in Atultison with cursors at the locations showing the values in part(f) - Suppose you waited to modify the design m Problem .2 to reach an overall maximum gain 01100 at the tthomant frequency (thd. but keep the same pawhand and input impedance. What single clement could you change in your bandpass filler and what value would you change it to?
- Using your bandpass circuit ekments from Probkm 2(a) & 21b) as building blocks (the low-pass and high-pass fillers). ctmwruct a 3s-order bandposs filler by cascading these filters together in Multi:1m and perform the same AC sweep as in Problem 2. a From the frespieney sweep determine tee . Mo , land on, a. Print the circuit and AC sweep with visors show ing these values. b. What is Q for your 3s-order filler design?