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HT12e: How is this a 2¹² encoder?
HOA0901 Wheel Encoder CircuitHow to fake an encoder signal with one function generator?How to make a 7 to 3 priority encoder?How does the plastic-tube inductor in this wireless transmitter work?What type of encoder is this (optical, magnetic, inductive… etc)? and how does it operate?How to convert analog output from sensors to digital without microcontroller?What is this encoder with micro DC motor in camera auto focus system?RF Module gets stuck with DC MotorsDetermining optical rotary encoder RPMConfused why outputs of a priority encoder could be X instead of 0 or 1
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$begingroup$
I am using HT12E, for a rf transmitter circuit. As per the datasheet HT12E is a 2¹² encoder.
Ideally such an encoder must have 2¹² inputs and 12 outputs. In addition to that all the inputs should be 1 exclusively.
When i look at the IC, I see 12 inputs A0-A7 + AD8-AD11, which go into the transmission gate circuit of the IC.
Can someone help me understand this part of the working ?
rf encoder
edited 9 hours ago
Marcus Müller
37.1k364104
asked 9 hours ago
YashYash
82
$endgroup$
add a comment |
$begingroup$
I am using HT12E, for a rf transmitter circuit. As per the datasheet HT12E is a 2¹² encoder.
Ideally such an encoder must have 2¹² inputs and 12 outputs. In addition to that all the inputs should be 1 exclusively.
When i look at the IC, I see 12 inputs A0-A7 + AD8-AD11, which go into the transmission gate circuit of the IC.
Can someone help me understand this part of the working ?
rf encoder
edited 9 hours ago
Marcus Müller
37.1k364104
asked 9 hours ago
YashYash
82
$endgroup$
1
$begingroup$
I haven't looked, but from your description it appears that "$2^12$ inputs" (your term) means instead "$2^12$ symbols." The 12 inputs make sense then.
$endgroup$
– jonk
9 hours ago
$begingroup$
that appears to be a type of parallel to serial converter ... it encodes 12 inputs into a bit stream ... 12 inputs and 1 output
$endgroup$
– jsotola
9 hours ago
add a comment |
$begingroup$
I am using HT12E, for a rf transmitter circuit. As per the datasheet HT12E is a 2¹² encoder.
Ideally such an encoder must have 2¹² inputs and 12 outputs. In addition to that all the inputs should be 1 exclusively.
When i look at the IC, I see 12 inputs A0-A7 + AD8-AD11, which go into the transmission gate circuit of the IC.
Can someone help me understand this part of the working ?
rf encoder
edited 9 hours ago
Marcus Müller
37.1k364104
asked 9 hours ago
YashYash
82
$endgroup$
I am using HT12E, for a rf transmitter circuit. As per the datasheet HT12E is a 2¹² encoder.
Ideally such an encoder must have 2¹² inputs and 12 outputs. In addition to that all the inputs should be 1 exclusively.
When i look at the IC, I see 12 inputs A0-A7 + AD8-AD11, which go into the transmission gate circuit of the IC.
Can someone help me understand this part of the working ?
rf encoder
rf encoder
edited 9 hours ago
Marcus Müller
37.1k364104
asked 9 hours ago
YashYash
82
edited 9 hours ago
Marcus Müller
37.1k364104
asked 9 hours ago
YashYash
82
edited 9 hours ago
Marcus Müller
37.1k364104
edited 9 hours ago
Marcus Müller
37.1k364104
edited 9 hours ago
Marcus Müller
37.1k364104
37.1k364104
asked 9 hours ago
YashYash
82
asked 9 hours ago
YashYash
82
asked 9 hours ago
YashYash
82
82
1
$begingroup$
I haven't looked, but from your description it appears that "$2^12$ inputs" (your term) means instead "$2^12$ symbols." The 12 inputs make sense then.
$endgroup$
– jonk
9 hours ago
$begingroup$
that appears to be a type of parallel to serial converter ... it encodes 12 inputs into a bit stream ... 12 inputs and 1 output
$endgroup$
– jsotola
9 hours ago
add a comment |
1
$begingroup$
I haven't looked, but from your description it appears that "$2^12$ inputs" (your term) means instead "$2^12$ symbols." The 12 inputs make sense then.
$endgroup$
– jonk
9 hours ago
$begingroup$
that appears to be a type of parallel to serial converter ... it encodes 12 inputs into a bit stream ... 12 inputs and 1 output
$endgroup$
– jsotola
9 hours ago
1
1
$begingroup$
I haven't looked, but from your description it appears that "$2^12$ inputs" (your term) means instead "$2^12$ symbols." The 12 inputs make sense then.
$endgroup$
– jonk
9 hours ago
$begingroup$
I haven't looked, but from your description it appears that "$2^12$ inputs" (your term) means instead "$2^12$ symbols." The 12 inputs make sense then.
$endgroup$
– jonk
9 hours ago
$begingroup$
that appears to be a type of parallel to serial converter ... it encodes 12 inputs into a bit stream ... 12 inputs and 1 output
$endgroup$
– jsotola
9 hours ago
$begingroup$
that appears to be a type of parallel to serial converter ... it encodes 12 inputs into a bit stream ... 12 inputs and 1 output
$endgroup$
– jsotola
9 hours ago
add a comment |
2 Answers
2
active
oldest
votes
$begingroup$
You're conflating a couple of definitions of the word "encoder". In this case, the chip is taking 12 binary inputs and encoding them as a serial word along with some synchronization information. The resulting word has 212 different states or values.
There is a different kind of (combinatorial) circuit that accepts 2N separate inputs and encodes the highest-valued one as an N-bit binary number. This is known as a "priority encoder".
answered 9 hours ago
Dave Tweed♦Dave Tweed
127k10158275
$endgroup$
add a comment |
$begingroup$
A chip with 212 inputs would have $ ( 2 ^ 12 ) ^12 $ possible combinations.
A 12-bit chip has 4096 combinations.
answered 7 hours ago
TransistorTransistor
92.8k788203
$endgroup$
add a comment |
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2 Answers
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2 Answers
2
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votes
$begingroup$
You're conflating a couple of definitions of the word "encoder". In this case, the chip is taking 12 binary inputs and encoding them as a serial word along with some synchronization information. The resulting word has 212 different states or values.
There is a different kind of (combinatorial) circuit that accepts 2N separate inputs and encodes the highest-valued one as an N-bit binary number. This is known as a "priority encoder".
answered 9 hours ago
Dave Tweed♦Dave Tweed
127k10158275
$endgroup$
add a comment |
$begingroup$
You're conflating a couple of definitions of the word "encoder". In this case, the chip is taking 12 binary inputs and encoding them as a serial word along with some synchronization information. The resulting word has 212 different states or values.
There is a different kind of (combinatorial) circuit that accepts 2N separate inputs and encodes the highest-valued one as an N-bit binary number. This is known as a "priority encoder".
answered 9 hours ago
Dave Tweed♦Dave Tweed
127k10158275
$endgroup$
add a comment |
$begingroup$
You're conflating a couple of definitions of the word "encoder". In this case, the chip is taking 12 binary inputs and encoding them as a serial word along with some synchronization information. The resulting word has 212 different states or values.
There is a different kind of (combinatorial) circuit that accepts 2N separate inputs and encodes the highest-valued one as an N-bit binary number. This is known as a "priority encoder".
answered 9 hours ago
Dave Tweed♦Dave Tweed
127k10158275
$endgroup$
You're conflating a couple of definitions of the word "encoder". In this case, the chip is taking 12 binary inputs and encoding them as a serial word along with some synchronization information. The resulting word has 212 different states or values.
There is a different kind of (combinatorial) circuit that accepts 2N separate inputs and encodes the highest-valued one as an N-bit binary number. This is known as a "priority encoder".
answered 9 hours ago
Dave Tweed♦Dave Tweed
127k10158275
answered 9 hours ago
Dave Tweed♦Dave Tweed
127k10158275
answered 9 hours ago
Dave Tweed♦Dave Tweed
127k10158275
answered 9 hours ago
Dave Tweed♦Dave Tweed
127k10158275
127k10158275
add a comment |
add a comment |
$begingroup$
A chip with 212 inputs would have $ ( 2 ^ 12 ) ^12 $ possible combinations.
A 12-bit chip has 4096 combinations.
answered 7 hours ago
TransistorTransistor
92.8k788203
$endgroup$
add a comment |
$begingroup$
A chip with 212 inputs would have $ ( 2 ^ 12 ) ^12 $ possible combinations.
A 12-bit chip has 4096 combinations.
answered 7 hours ago
TransistorTransistor
92.8k788203
$endgroup$
add a comment |
$begingroup$
A chip with 212 inputs would have $ ( 2 ^ 12 ) ^12 $ possible combinations.
A 12-bit chip has 4096 combinations.
answered 7 hours ago
TransistorTransistor
92.8k788203
$endgroup$
A chip with 212 inputs would have $ ( 2 ^ 12 ) ^12 $ possible combinations.
A 12-bit chip has 4096 combinations.
answered 7 hours ago
TransistorTransistor
92.8k788203
answered 7 hours ago
TransistorTransistor
92.8k788203
answered 7 hours ago
TransistorTransistor
92.8k788203
answered 7 hours ago
TransistorTransistor
92.8k788203
92.8k788203
add a comment |
add a comment |
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$begingroup$
I haven't looked, but from your description it appears that "$2^12$ inputs" (your term) means instead "$2^12$ symbols." The 12 inputs make sense then.
$endgroup$
– jonk
9 hours ago
$begingroup$
that appears to be a type of parallel to serial converter ... it encodes 12 inputs into a bit stream ... 12 inputs and 1 output
$endgroup$
– jsotola
9 hours ago