Lecture+2+-+Signals+-+Calibration.pdf

Analyzing signal conditioning components gain and

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Analyzing Signal Conditioning Components Gain and Phase properties of: Amplifier Filter Power Supply (Output only) Variable Power Supply (as debugging tool) Calibrate the Signal Path Linear Regression Error Analysis
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Analog Signal Properties Amplitude Height of the Signal Peak or Peak-to-Peak (Pk-Pk) Symbol: A Frequency Times Each Second a Signal Repeats Related to Period Symbol: f or ω (Omega) Related: Period P = 1/ω DC Offset or DC Bias Average Voltage of the Signal Phase Time Delay of a Signal (or Time Delay Between Signals with Same Frequency) Symbol: ϕ (Phi) For a Sine Wave V(t) = V AC (t) + V DC = Amplitude * sin( Frequency * t + Phase ) + V DC = A * sin( ω * t + ϕ ) + V DC By crh23, CC BY-SA 4.0, By Peppergrower, CC BY-SA 3.0, Amplitude Phase ϕ
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Signal Types Power Defined by: High Voltage/Current Types: Direct Current (DC) Alternating Current (AC) Data Typically Defined by: Low Voltage (3.3V or 5V) Low Current ( < 1 Amp ) Sensor/Actuator Many Different Combinations Many Different Channels Digital Discrete Voltage Levels Logic: V(t) = 0V or [ 3.3V or 5V ] Time-Based Data Transfer Analog Non-Discrete Voltage Levels Amplitude/Frequency-Based Data Transfer V(t) = V AC (t) + V DC V AC (t) = Variable Component V DC = Constant Component
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Signal Acquisition (Oscilloscope) ¸µ ms ¸ Volt Use as much oscilloscope “screen” as possible (Voltage Scale) Show multiple cycles to get an accurate frequency reading (Time Scale) Trigger!!
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