THA Problem 5: 2011 Using a capacitive humidity sensor whose transfer function is given by C=C(1-α);where a % is relative humidity (~ ε,.). - - Cco = Cc |α-0% = 1μF 1- Design a conditioning circuit to measure the relative humidity a=[0-100]%. 2- Draw the frequency response.

Find the transient current (a general solution) in the RLC-circuit in the figure below for the given data. R = 6 N, L = 0.2 H, C = 0.025 F, E = 190 sin (10t) V R E(t) = E, sinot Write arbitrary constants as C1 and C2. ll

1) Fast help needed to answer this Engineeing question. Check image.   Postive feedback for right answer :)

Design an ACTIVE band-pass filter for the midrange part of a loudspeaker so that the bandpass region is 400 Hz-2000 Hz (as defined by the -3dB points). Design the circuit so that the absolute gain is 2. a. Draw the circuit diagram and specify the resistor and capacitor values. Assume you can use either 100, 330, 500, or 1000 Ohm resistors and can select any value of capacitor. b. Sketch the frequency response (Gain [dB] vs. frequency (Hz)). Note that you will need to convert your gain to dB before plotting. Magnitude (dB) 15 10 5 midrange 12 1 -5 -10 -15 -20 -25 10 100 1,000 Frequency (Hz) 10,000 100,000

If vsig is a triangle waveform, determine the maximum amplitude that vsig can have? Showyour calculation.

The figure is shows the first stage of a superheterodyne receiver. The desired input signal is at a frequency of 700 MHz. The local oscillator (L.O) frequency is 1 GHz. The mixer is an ideal multiplier with a gain independent of frequency. A band-pass filter (BPF) is used to select the Intermediate Frequency (IF) output at 300 MHz. Input Mixer LO. 8PF IF Input (a) What is the image frequency of the desired input? (b) A Low Pass Filter (LPF) can be used before the mixer to reject the image frequency. If a perfect rejection (zero transmission) of the image is desired, what type of LPF should be employed?

1.)A full-wave rectified signal of 18 V peak is fed into a capacitor filter. What is the voltage regulation of the filter if the output is 17 V dc at full load? 2.)A full-wave rectified voltage of 18 V peak is connected to a 400uF filter capacitor. What are the ripple and dc voltages across the capacitor at a load of 100 mA?    pls provide complete solution

7. In DC analysis all capacitors are replaced by a short circuit equivalent and in AC as an open circuit. Select one:TrueFalse   8. En el análisis AC del BJT todas las fuentes de cd se hacen igual a cero y las reemplaza una conexión de cortocircuito a tierra.   Seleccione una: Verdadero Falso   9. The superposition theorem is applicable to the analysis and design of the dc and ac components of a BJT network, allowing the analysis of the system's dc and ac responses to be separated. Select one:TrueFalse   10. An equivalent model is a combination of appropriately selected circuit elements that accurately simulates the real behavior of a semiconductor device in any operating condition. Select one:TrueFalse

50. A signal x(t) = = sinc (150nt) is sampled at a rate of a) 100 Hz, b) 200 Hz, and c) 300Hz. For each of these cases, explain if you can recover the signal x(t) from the sampled signal.

C.) A part of a radio tuning circuit has an inductance of 0.2microH and a variablecapacitor. If the circuit is to tune at 102.7MHz FM frequency, determine the value ofthe capacitor needed to tune this circuit.