Fully labelled block diagram of 3-bit ‘Flash Encoding’

[adam90]

Homework Statement

Draw a fully labelled block diagram of a 3-bit ‘Flash Encoding’ analogue to digital converter (ADC) and explain how the device converts an analogue voltage into a 3-bit binary number.

The Attempt at a Solution

anyone know how to do this or have any sources would be great.

 

[berkeman]

Homework Statement

Draw a fully labelled block diagram of a 3-bit ‘Flash Encoding’ analogue to digital converter (ADC) and explain how the device converts an analogue voltage into a 3-bit binary number.

The Attempt at a Solution

anyone know how to do this or have any sources would be great.

What are the different types of A-to-D Converters (ADCs)? Why would you use a Flash topology ADC versus the other topologies?

http://en.wikipedia.org/wiki/Analog_to_digital_converter

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[adam90]

hi thanks for replying, how would i go about the 3-bit binary part. regards

 

[berkeman]

hi thanks for replying, how would i go about the 3-bit binary part. regards

Read the link, read your textbook, answer my question, then sketch away.

 

[DeeNos]

I can provide a response to this request. A fully labelled block diagram of a 3-bit 'Flash Encoding' ADC would look like this:

[Image of fully labelled block diagram of a 3-bit 'Flash Encoding' ADC]

Explanation:

1. Voltage Divider: The input analogue voltage is first divided into 8 equal parts using a voltage divider circuit.

2. Comparators: The divided voltage is then compared with reference voltages using 3 comparators. Each comparator has a different reference voltage, which is generated by a digital-to-analogue converter (DAC).

3. Encoder: The outputs of the comparators are then fed into an encoder, which converts the 3-bit binary signals into a single binary output.

4. Output: The final output is a 3-bit binary number, representing the digital equivalent of the input analogue voltage.

How it works:

The input analogue voltage is divided into 8 equal parts, resulting in 8 different voltage levels. Each comparator compares the input voltage with a reference voltage and generates a binary output (0 or 1) depending on whether the input voltage is higher or lower than the reference voltage.

For example, if the input voltage is higher than the reference voltage of the first comparator, it will output a 1. If the input voltage is lower than the reference voltage, it will output a 0. This process is repeated for all 3 comparators, resulting in a 3-bit binary number.

The encoder then combines these 3 binary signals into a single binary output, which represents the digital equivalent of the input analogue voltage. This 3-bit binary number can then be further processed or stored for further use.

In summary, a 3-bit 'Flash Encoding' ADC uses a combination of voltage dividers, comparators, and an encoder to convert an analogue voltage into a 3-bit binary number. This process allows for a fast and accurate conversion of analogue signals into digital form.