Multiple Gate Instantiation List
Hardware description languages provide concise ways to instantiate multiple primitive gates without writing separate lines for each. When a design requires several identical gates driving independent signals, developers group them into a single instantiation statement to improve readability and reduce verbosity.
The module computes the bitwise AND of two 4-bit input vectors. It produces a 4-bit output vector where each bit is the logical AND of the corresponding bits from the two input vectors. To complete this exercise, the design must use a single primitive keyword followed by four comma-separated instances.
This circuit is purely combinational. There is no clock and no reset. The output updates immediately when any input changes. All outputs are driven continuously.
| Signal | Direction | Width | Description | |--------|-----------|-------|-------------| | a | input | 4 | First operand | | b | input | 4 | Second operand | | y | output | 4 | Bitwise AND result |
Constraints
- The design must instantiate exactly four
andgates. - All four gate instantiations must share a single
andkeyword, separated by commas. - Continuous assignments using the
assignkeyword and the&operator are not permitted. - Arrays of instances (e.g.,
and g[3:0] (...)) are not permitted for this specific exercise. - Outputs are purely combinational.
- Bit widths are exactly 4 bits for all ports.
Topics
Solve this problem
Write the module in Verilog, SystemVerilog or VHDL. Your submission is compiled and simulated against a real testbench — you get the waveform back, not a stored answer.
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