di/dt Noise in CMOS Integrated Circuits
Analog Integrated Circuits and Signal Processing - Special issue: analog design issues in digital VSLI circuits and systems
Design of Balanced and Constant Weight Codes for VLSI Systems
IEEE Transactions on Computers
Balanced Codes with Parallel Encoding and Decoding
IEEE Transactions on Computers
Efficient Encoding and Decoding Schemes for Balanced Codes
IEEE Transactions on Computers
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Signalling off-chip requires significant current. As a result, a chip''s power-supply current changes drastically during certain output-bus transitions. These current fluctuations cause a voltage drop between the chip and circuit board due to the parasitic inductance of the power-supply package leads. Digital designers often go to great lengths to reduce this ``transmitted'''' noise. Cray, for instance, carefully balances output signals using a technique called differential signalling to guarantee a chip has constant output current. Transmitted-noise reduction costs Cray a factor of two in output pins and wires. Coding achieves similar results at smaller costs.