QUESTION 1 Anna the Audiophile has asked for your help to build an amplifier and filter...
QUESTION 1 Barry the Biologist has asked for your help to build an amplifier and filter to take small signals from his bird sensing microphones and amplify them so that he can capture the signals on his PC. The microphone produces AC signals at varying frequencies with 10 mV magnitude. His PC requires the signals to be 1 V magnitude. The signals that Barry is interested in are above 1 kHz Hz. He would like the filter to attenuate signals...
QUESTION Barry the Biologist has asked for your help to build an amplifier and filter to take small signals from his bird sensing microphones and amplify them so that he can capture the signals on his PC. The microphone produces AC signals at varying frequencies with 10 mV magnitude. His PC requires the signals to be 1 V magnitude. The signals that Bary is interested in are above 1 kHz Hz. He would like the filter to attenuate signals at...
A Biologist needs your help to build an amplifier and filter to take small signals from his bird sensing microphones and amplify them so that he can capture the signals on his PC. The microphone produces AC signals at varying frequencies with 10 mV magnitude. His PC requires the signals to be 1 V magnitude. The signals that Barry is interested in are above 1 kHz Hz. He would like the filter to attenuate signals at frequencies below 1 kHz....
Part A: Design the power supply component of your amplifier and filter. You will need to produce a dual-sided power supply with +10V, 0V and –10V using the 12 VAC plugpack as an AC source. Assume that your amplifier and filter will draw around 10 mA of current on both the positive and negative voltage supplies. Your design should include components to minimise voltage ripple. Show calculations for the selection of components where practical. Show a circuit diagram for the...
OUESTION 1 Anna is designing an audio amplifier for her headphones. She wants to calculate the real DC gain of the amplifier before putting music through it to make sure it won't destroy her headphones. She has setup a test circuit of the non-inverting amplifier shown below. She has used a cheap poor quality op-amp where the input resistance is 1 kQ, the output resistance is 4 Q and the open loop gain is 100xvin 2Q2 ww 4 2 V...
The bridge-rectifier isce Fig. 4) circuit with a filter capacitor has R = 100 ohms. The Scondary transformer delivers a sinusoid of 15 V (rrns, and has a frequency of 80 Hz. The diodes have Vo = D.7 V each. (a) What will be the value of the filter capacitor so that the Apple voltage is limited to below 100 mV peak-to-peak? (3 marks) b) What is the DC voltage at the output of the system? [2 marks) (c) What...
(a) Design an inverting amplifier by choosing suitable resistor values for R1 and R2 to produce a gain of 5 when both switches Sw1 and Sw2 are open. (b) Design the bias input circuit by choosing suitable resistors R3 and R4 such that the voltage vb will be 0.5V if the positive power supply of the op-amp is connected to a 5V battery. Again both switches are open. (c) Given Sw1 is open, the amplifier is turned on for enough...
Question 1 In the diagram of Superheterodne AM receiver shown below explain the function of each block. (a) 15 marks Antenna Speaker Audio and power amplifiers RF IF Mixer Detector Mi amplifier amplifier AGC --_Local Gang tuned oscillator (b) For a 4-bit DAC, calculate the output voltage for an input code word 1010 if a [10 marks] logic 1 is 10V and a logic 0 is 0V, and R = RFI kΩ Total: 25 marks] Question 2 (a) Explain the...
SOLVE ALL THE 3 questions using the properties of OPERATIONAL AMPLIFIER AND BJTs. Problem 1 10 Marks A humidity sensor produces linear output voltage in the range of 0 V to 10 mV for humidity levels of 0 % to 100 % respectively. You are required to design the inverting op-amp circuit to achieve the voltage gain of 1000. Op-amp feed-back current should be 0.2 mA when op-amp output is at maximum. Solution: Problem 2 We discussed the summing circuit...
ASAP! Please answer this question showing steps for thumb up! Question 1 (4 Marks) Q.A. 1 -Statement: DC biasing of a CE amplifier circuit is as in Fig. Q.1. Assume the parameters, Vcc = 18 volt, RE = 500 ohm; B = 125; RL = 1000 ohm, Rc =1500 ohm and source resistance and Rs 1500 ohm. The amplifier is excited by a source, vs(t) = Vm * sin(2teft) with Vm = 25 mV peak and f = 1000 Hz;...