DACs Common Applications - Function Generators EE301 : ElectronicCircuits15 Digital Oscilloscopes Digital Input Analog Ouput Signal Generators Sine wave generation Square wave generation Triangle wave generation Random noise generationġ 1.
SignalfromDACcanbesmoothedbyaLowpass filter 0 bit nth bit n bit DAC 011010010101010100101 101010101011111100101 000010101010111110011 010101010101010101010 111010101011110011000 100101010101010001111 Digital Input Filter Piece-wise Continuous Output AnalogContinuous Output DACs Common Applications-Circuit Components EE301 : ElectronicCircuits13 Voltage controlled Amplifier digital input, External Reference Voltage as control Digitally operated attenuator External Reference Voltage as input, digital control Programmable Filters Digitally controlled cutoff frequencies DACs Common Applications-Digital Audio EE301 : ElectronicCircuits14 CD Players MP3 Players Digital Telephone/Answering Machines 1 2 3 1. Digital to Analog Converters (DAC) EE301 : ElectronicCircuits8 Whatisadigitaltoanalogconverter (DAC)? Convertsdigitalinputsignaltoananalog output signal 1001 0101 0011 0111 1001 1010 1010011010011110000110010101000011001000010000 Digital to Analog Converters (DAC) EE301 : ElectronicCircuits9 Analog Output Signal Digital Input Signal What a DAC Looks Like: EE301 : ElectronicCircuits10 Digital to Analog Converters - Common Applications EE301 : ElectronicCircuits11 Generic use Circuit Components Digital AudioFunction Generators/Oscilloscopes Motor Controllers DACs Common Applications -Generic EE301 : ElectronicCircuits12 Used when a continuous analog signal is required. AnDigital-to-Analogconverter(DACorD/Aconverter)functionistoconvert this digital values (in binary) back to analog values. Ananalog-to-digitalconverter(ADCorA/Dconverter)convertsananalog value to digital equivalent in a process called digitizing. Digital Voltages Has only 2 useful values that is high and low. Analog-to-Digital Converters (ADCs) Overview Definitions: Analog voltages Voltage that may vary continuouslythroughout some range. Data acquisition EE301 : ElectronicCircuits Data distribution EE301 : ElectronicCircuits 6 Introduction CONVERTERS EE301 : ElectronicCircuits7 1. 3 Introduction-Data acquisition EE301 : ElectronicCircuits4 Dataconverters:thedevicesthatperformtheinterfacing functionbetweenanaloganddigitalworldsareanalog-to-digital (A/D) and digital-to-analog (D/A) converters interfacebetweentherealworldofphysical parameters,whichareanalog,andtheartificialworld of digital computation and control. Construct the circuits to convert digital signals to analogue signals Resistive divider circuit. Describe the methods of converting digital signals to analogue signals Explain the applications of D/A converter. Understand the methods of converting digital signals to analogue signals (DAC).
Understandthemethodsofconvertinganalogsignalsto digital signals (ADC).
Chapter 6: AD/DA CONVERTERSEE301 : ElectronicCircuits1 Learning Outcomes Upon completing this chapter, students should be able to: Understandthemethodsofconvertingdigitalsignalsto analogue signals (DAC).
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