Question

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) in(2.82x 103) sin(3.77x 103t) sin(3.45x 103t) Calculate the period of one cycle for each section. How many cycles in each section A. B. Design an operational amplifier that can amplify the voltage values by gain equal to 15 times without changing the phase 3 sign should include components of Op-amp, drawing of the amplifier). Choose resistors between 1-100kQ. C. Draw signal after amplification D. Design an active filter that can allow only the frequencies located between (530-620 Hz) to be passed (design should include low pass and high pass components, complete drawing of Filter) Choose resistors between 1-100kQ and capacitor between 10-5f and 10-7F Draw the signal of sensor after filtration E. F. Design 3bit ADC that can convert the signal in step E using the following ADCs: (1) Direct Flash ADC: find the following: 1. determine the reference voltage 2 Resolution of ADC.4. Calculate the value of ADC if input voltage v 7.5v (2) Digital Ramp ADC: find the following: 1. Range of the converter. 2. Resolution of DAC? If V-8v, how much the counter value? (3) Successive Approximation ADC: find the following: 1. Range of the converter. 2. Resolution of DAC? If V-6.5v, how much the counter value? (4) Sigma-Delta ADC: 1. Determine the reference voltage 2- Resolution of DAC.4 Calculate the value of ADC if input voltage v-10v

Answer 1

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