An electronic circuit is an electrical circuit that also contains active electronic devices such as transistors or vacuum tubes.Electronic circuits can display highly complex behaviors, even though they are governed by the same laws as simple electrical circuits.
Electronic circuits can usually be categorized as analog, digital, or mixed-signal (a combination of analog and digital) electronic circuits.
Analog circuits
Analog electronic circuits are those in which electric signals vary continuously to correspond to the information being represented. Electronic equipment like voltage amplifiers, power amplifiers, tuning circuits, radios, and televisions are largely analog (with the exception of their control sections, which may be digital, especially in modern units).
The basic units of analog circuits are passive (resistors, capacitors, inductors) and active (independent power sources and dependent power sources). Components such as transistors may be represented by a model containing passive components and dependent sources. Another classification is to take impedance and independent sources and opamp as basic electronic components; this allows us to model frequency dependent negative resistors, gyrators, negative impedance converters, and dependent sources as secondary electronic components.
Digital circuits
In digital electronic circuits, electric signals take on discrete values to represent logical and numeric values that represent the information to be processed. Transistors are used primarily as switches to make logic gates. Examples of electronic equipment which use digital circuits include digital wristwatches, calculators and PDAs, and microprocessors.
Mixed-signal circuits
Mixed-signal or hybrid circuits contain elements of both analog and digital circuits. Examples include comparators, timers, PLLs, ADCs (analog-to-digital converters), and DACs (digital-to-analog converters).
3 Basic Parts
Energy source - converts nonelectric energy into energy, examples are batteries and generators.
Output device - uses electric energy to do work and a connection, examples are motor and lamp.
Connection - allows electric current to flow, examples are wire and cable.
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2. Name some electronic equipment that is largely “analog”.
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3. Are the control sections of the equipment you named above, also “analog”?
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4. How can electronic circuits be categorized?
5. What is an electronic circuit?
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6. What does it also contain?
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Write the correct present perfect tense of the verbs in parenthesis, to complete the paraghraphs.
In digital electronic circuits, electric signals ________ __________ (take) on discrete values to represent logical and numeric values that ________ __________ (represent) the information to be processed. Transistors ________ been __________ (use) primarily as switches to make logic gates. Examples of electronic equipment which ________ __________ (use) digital circuits include digital wristwatches, calculators and PDAs, and microprocessors.
Mixed-signal circuits
3 Basic Parts
Energy source – ________ __________ (convert) nonelectric energy into energy, examples are batteries and generators.
Output device – ________ __________ (use) electric energy to do work and a connection, examples are motor and lamp.
Connection – ________ __________ (allow) electric current to flow, examples are wire and cable.
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