A light bulb and a switch are examples of an analog circuit.

More Questions from Interfacing to the Analog World

• A summing op-amp can be used for DAC.
• Voltage-to-frequency ADC is more complicated than other ADCs.
• One form of a sigma/delta modulator circuit is designed to convert a continuous analog signal into a modulated bit stream (A/D).
• Flash A/D converters depend on an input clock pulse to perform each conversion.
• The time required to complete a conversion cycle is called conversion time.
• An operational amplifier is used as a comparator.
• In a counter-ramp A/D converter, the end-of-conversion line must be tied back to the clear input of the counter to change the circuit to perform continuous conversions.
• When analog inputs from several sources are to be converted, a multiplexing technique can be used so that one ADC may be time-shared.
• A D/A converter changes things such as temperature variations into digital quantities.
• In a binary-weighted D/A converter the sum of all the currents from the binary weighted resistors flows through the operational amplifier.

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