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Subelement E
Digital Logic
Section 40
Counters, Dividers, Converters
What is the purpose of a prescaler circuit?
• Converts the output of a JK flip-flop to that of an RS flip-flop.
• Multiplies an HF signal so a low-frequency counter can display the operating frequency.
• Prevents oscillation in a low frequency counter circuit.
Divides an HF signal so that a low-frequency counter can display the operating frequency.

What is the purpose of a prescaler circuit?

Divides an HF signal so that a low-frequency counter can display the operating frequency.

From salvyhead: Mnemonic: think of -divisions- on a -scale-.

Generally, the prescaler circuit drops the HF signal to an operating frequency at a lower level. If you start with 32 MHz but need only 8 MHz, the prescaler circuit will divide by 4 the 32 MHz signal

See Wikipedia's article on Prescaler

And, see the ScienceDirect site for the article Prescaler

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What does the term “BCD” mean?
• Binaural coded digit.
• Bit count decimal.
Binary coded decimal.

What does the term “BCD” mean?

Binary coded decimal.

Our numeric system uses 10 digits, 0 through 9. A binary uses only 2, 0 and 1. When you convert a decimal system's number into a binary, you end up with a binary coded decimal.

See Wikipedia's article Binary-coded decimal

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What is the function of a decade counter digital IC?
• Decode a decimal number for display on a seven-segment LED display.
Produce one output pulse for every ten input pulses.
• Produce ten output pulses for every input pulse.

What is the function of a decade counter digital IC?

Produce one output pulse for every ten input pulses.

See Wikipedia's article Counter (digital)

Also, see the Electronics for U site for the article Decade Counter | Counter Circuit Basics

And, see the Electronics Tutorials site for the article BCD Counter Circuit

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What integrated circuit device converts an analog signal to a digital signal?
• DAC
• DCC
• CDC

What integrated circuit device converts an analog signal to a digital signal?

From kj6prf:

ADC stands for "Analog to Digital Converter."

Modems used to dial up to AOL in days past, were actually converting digital signals to analog. Modems facilitated sending digital signals over analog lines. If a device converts digital to analog, it is a DAC, but if it converts analog to digital, it is an ADC.

See Wikipedia's article on Digital-to-analog converter and
the article on Analog-to-digital converter

Also, see the Tutorials Point site for the article on Digital to Analog Converters

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What integrated circuit device converts digital signals to analog signals?
• DCC
• CDC
DAC

What integrated circuit device converts digital signals to analog signals?

DAC

From kb9lth:

DAC: Digital Analog Converter

Modems used to dial up to AOL in days past, were actually converting digital signals to analog. Modems facilitated sending digital signals over analog lines. If a device converts digital to analog, it is a DAC, but if it converts analog to digital, it is an ADC.

See Wikipedia's article on Digital-to-analog converter and
the article on Analog-to-digital converter

Also, see the Tutorials Point site for the article on Digital to Analog Converters

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In binary numbers, how would you note the quantity TWO?
0010
• 0002
• 2000
• 0020

In binary numbers, how would you note the quantity TWO?

0010

From kb9lth:

Binary is represented by only numeral one and zero. Answers with anything else are not correct.

See Wikipedia's article Binary-coded decimal