Signal Conditioning Circuit
(a) Draw a circuit to show the design of signal conditioning circuit that accepts a common mode input to drive an Analogue to Digital Converter (ADC) with a differential input. It should have pre-settable gains of X1 X5 and anti-aliasing filter allowing response up to 200Hz.
(b) Calculate the component values for your signal conditioning circuit drawing for question (a). The overall maximum DC gain from input to the ADC should be 5 and the input resistance should be set to 1MΩ.
(c) The low pass filter should have cut-off frequency of 200Hz. Calculate the values of the components to give the desired first order response. It should have a DC gain of 1.
(d) For a first order low pass filter with breakpoint set to 200Hz and pass band gain of 0dB, what is the residual signal amplitude at 800Hz with an input signal of 2.5V peak?
(e) What is the minimum sampling rate for the ADC for the desired frequency response of 200Hz? What is the residual signal amplitude at this frequency for an input signal of 2.5V?
(f) For 14bit converter, with a 3V full scale deflection, how many bits does this residual signal represent?
Homework Answers
Signal Conditioner
(a) Draw a circuit to show the design of signal conditioning circuit that accepts a common mode input to drive an Analogue to Digital Converter (ADC) with a differential input. It should have pre-settable gains of X1 X5 and anti-aliasing filter allowing response up to 200Hz. (b) Calculate the component values for your signal conditioning circuit drawing for question (a). The overall maximum DC gain from input to the ADC should be 5 and the input resistance should be set to...
Signal And System Build a first order LPF with cut-off frequency at 10 kHz. A simple...
Signal And System
Build a first order LPF with cut-off frequency at 10 kHz. A simple low pass filter (first order) circuit is shown in Figure 1. V = gain 0.7 (a) RC low Pass Filter Circuit Figure 1 (b) Frequency ResponseCurve show that the impulse response for a first order low-pass filter in Figure 1 is given by 1 H(f) = 1+j295RC The cut-off frequency for a low-pass filter is fcutoff ZRC Generate a rectangular pulse with frequency of...
passband ripple and the stopband attenuation in db formula
Block diagram of a real time signal processing system is shown in Figure 1. Assuming that the system operates in audio frequency band (0 to 20 KHz) and uses bipolar, analog to digital converter (ADC) with peak to peak input voltage range= 10 Volt is used, estimate: i. The quantization step size; (2 Marks) ii. The minimum stop band attenuation in dB, Amin, for the anti-aliasing filter; (4 Marks) iii. Sketch the frequency response of the antialiasing filter; iv. The...
Problem 1: Signal conditioning and ADC Given the measurement of voltage sensor in the first 20 ms that involving a seve...
Problem 1: Signal conditioning and ADC Given the measurement of voltage sensor in the first 20 ms that involving a several noises causes a drift in measurement. The measurement signal fluctuates with time as a sine wave [sin(wt), ω in rad/s, t in ms] which can be approximately divided into four sections as in the following table Section I Section II on III 9St<13.2 Section IV Time (ms)OSt<5.5 Signal (volt) V-0.5+0.1 5.5 St<9 13.2 Sts20.5 V-0.6+0.1 V-0.55+0.1 V-0.65+0.1 sin(3.41x 103t)...
3. With the aid of a diagram, briefly explain th ing principle of a Successive a) Approximation Analog-to-Digital Conve...
3. With the aid of a diagram, briefly explain th ing principle of a Successive a) Approximation Analog-to-Digital Converter (ADC) b) An ADC has to be designed to convert voltages in the range from -5 V to +5 V, with a resolution below (better than) 1 mV. What is the minimum number of bits required to meet this design specification? An ADC has to be designed to convert input voltage signals with frequency c) components less than or equal o...
Question 3: a.) A signal with frequency of 9 kHz and amplitude of 200 µV is input...
Question 3: a.) A signal with frequency of 9 kHz and amplitude of 200 µV is input to a low pass filter with cutoff frequency of 700 kHz. What are the frequency and amplitude of the output signal? b.) A signal with frequency of 7 Hz and amplitude of 6 V is input to a low pass filter with cutoff frequency of 1 kHz. What are the frequency and amplitude of the output signal?
Problem 4: Design a first-order, strictly causal, low-pass DT filter to recover a low frequency sensor signal, corr...
Problem 4: Design a first-order, strictly causal, low-pass DT filter to recover a low frequency sensor signal, corrupted by high frequency noise. The signal can contain frequencies up to 10HZ and the noise has frequencies above IkHz. The sampling frequency is 20kHz and you may assume that there is no aliasing. If the highest distortion allowed for the signal is 1% in amplitude, what is the worst-case attenuation of the noise signal?
Problem 4: Design a first-order, strictly causal, low-pass...
is it ok to use R1=4.7Kohms and C1=330pf? And I want to know how to calculate the R2, Rsrc, and C2 tage 2:Baseband Filt...
is it ok to use R1=4.7Kohms and C1=330pf? And I want to know how
to calculate the R2, Rsrc, and C2
tage 2:Baseband Filter The filter schematic is shown in Fig. 3. Select resistor Rj and capacitor C1 so that the cut-off frequency of the filter response is below 100kHz. The input network formed by resistors Rsrc, R2 and capacitor C2 also has a low pass response that should attenuate the input Vsrc seen at the top of capacitor C2...
Low-Pass Filter Design and Testing (a) Let the desired signal be an AC with amplitude of...
Low-Pass Filter Design and Testing (a) Let the desired signal be an AC with amplitude of 3.2 V and frequency =2325Hz. What is the frequency of your desired AC signal?
this is a question from a review for a test. please help! An RC circuit with...
this is a question from a review for a test. please
help!
An RC circuit with R = 10 Kilo-ohms and C = 40 nano-Farads is constructed to serve as an example of a first order system and as a filter. The capacitor is uncharged when the circuit is assembled. Two sources of input voltage to the circuit are possible, a DC power supply or a function generator. 1a) (6 points) • What input source would be used to determine...
Signal And System
Build a first order LPF with cut-off frequency at 10 kHz. A simple low pass filter (first order) circuit is shown in Figure 1. V = gain 0.7 (a) RC low Pass Filter Circuit Figure 1 (b) Frequency ResponseCurve show that the impulse response for a first order low-pass filter in Figure 1 is given by 1 H(f) = 1+j295RC The cut-off frequency for a low-pass filter is fcutoff ZRC Generate a rectangular pulse with frequency of...
Problem 1: Signal conditioning and ADC Given the measurement of voltage sensor in the first 20 ms that involving a several noises causes a drift in measurement. The measurement signal fluctuates with time as a sine wave [sin(wt), ω in rad/s, t in ms] which can be approximately divided into four sections as in the following table Section I Section II on III 9St<13.2 Section IV Time (ms)OSt<5.5 Signal (volt) V-0.5+0.1 5.5 St<9 13.2 Sts20.5 V-0.6+0.1 V-0.55+0.1 V-0.65+0.1 sin(3.41x 103t)...
3. With the aid of a diagram, briefly explain th ing principle of a Successive a) Approximation Analog-to-Digital Converter (ADC) b) An ADC has to be designed to convert voltages in the range from -5 V to +5 V, with a resolution below (better than) 1 mV. What is the minimum number of bits required to meet this design specification? An ADC has to be designed to convert input voltage signals with frequency c) components less than or equal o...
Problem 4: Design a first-order, strictly causal, low-pass DT filter to recover a low frequency sensor signal, corrupted by high frequency noise. The signal can contain frequencies up to 10HZ and the noise has frequencies above IkHz. The sampling frequency is 20kHz and you may assume that there is no aliasing. If the highest distortion allowed for the signal is 1% in amplitude, what is the worst-case attenuation of the noise signal?
Problem 4: Design a first-order, strictly causal, low-pass...
is it ok to use R1=4.7Kohms and C1=330pf? And I want to know how
to calculate the R2, Rsrc, and C2
tage 2:Baseband Filter The filter schematic is shown in Fig. 3. Select resistor Rj and capacitor C1 so that the cut-off frequency of the filter response is below 100kHz. The input network formed by resistors Rsrc, R2 and capacitor C2 also has a low pass response that should attenuate the input Vsrc seen at the top of capacitor C2...
this is a question from a review for a test. please
help!
An RC circuit with R = 10 Kilo-ohms and C = 40 nano-Farads is constructed to serve as an example of a first order system and as a filter. The capacitor is uncharged when the circuit is assembled. Two sources of input voltage to the circuit are possible, a DC power supply or a function generator. 1a) (6 points) • What input source would be used to determine...
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