Analog Fundamentals: A Systems Approach 1st. Edition by Thomas L. Floyd, David M. Buchla | 9780132933940 | 0132933942 | Holooly

Analog and Digital Signals and Systems

Analog Fundamentals: A Systems Approach

149 SOLVED PROBLEMS

Question: 9.4

For the four-pole filter in Figure 9–12(b), determine the capacitance values required to produce a critical frequency of 2680 Hz if all the resistors in the RC low-pass networks are 1.8 Ω. Also select values for the feedback resistors to get a Butterworth response. ...

Verified Answer:

Both stages must have the same

f_c

....

Question: 15.1

A certain RDC has an 8-bit digital output. What is the angle being measured if the output code is 01001101? The left-most bit is the MSB. ...

Verified Answer:

To get the angle represented, add all the included...

Question: 10.6

A 555 timer confi gured to run in the astable mode (oscillator) is shown in Figure 10–39 . Determine the frequency of the output and the duty cycle. ...

Verified Answer:

f=\frac{1.44}{\left(R_1+2 R_2\right) C_{\ma...

Question: 7.6

certain op-amp has the open-loop response in Figure 7–19 . As you can see, the lowest closed-loop gain for which stability is assured is approximately 40 dB (where the closed-loop gain line still intersects the -20 dB/decade slope). In a particular application, a 20 dB closed-loop gain is required. ...

Verified Answer:

(a) The gain must be dropped so that the -20 dB/de...

Question: 12.10

For the antilog amplifier in Figure 12–31 , find the output voltage. Assume IEBO = 40 nA. ...

Verified Answer:

First of all, notice that the input voltage in Fig...

Question: 12.9

What is V out for a transistor log amplifier with Vin = 3 V and R 1 = 68 kΩ? Assume I EBO = 40 nA. ...

Verified Answer:

V_{\text {out }}=-(0.025 \mathrm{~V}) \ln \...

Question: 12.8

Determine the output voltage for the log amplifier in Figure 12–28 . Assume I R = 50 nA. ...

Verified Answer:

The input voltage and the resistor value are given...

Question: 12.7

The input to the OTA amplitude modulator in Figure 12–22 is a 50 mV peak-to-peak, 1 MHz sine wave. Determine the output signal, given the modulation voltage shown is applied to the bias input. ...

Verified Answer:

The maximum voltage gain is when

I_{\mathrm...

Question: 12.6

The OTA in Figure 12–20 is connected as an inverting fixed-gain amplifier. Determine the voltage gain. ...

Verified Answer:

Calculate the bias current as follows:

I_{\...

Question: 12.5

If an OTA has a gm = 1000 μS, what is the output current when the input voltage is 50 mV? ...

Verified Answer:

I_{\text {out }}=g_m V_{\text {in }}=(1000 ...

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