Patent ID: 6624764
Filing Date: 2003-09-23
Classification: H03K

Abstract:
A signal transmission device which transmits n-bit parallel digital signals through an I/O driver to reduce simultaneous switching noise in an integrated circuit chip, comprising:an encoder coupled to said I/O driver which receives said n-bit parallel digital signals and performs an encoding operation to said n-bit parallel digital signals to provide an encoded m-bit parallel digital signals for said I/O driver, where m>n and said encoding operation is performed by a rule that a number of logic-1 bits of said encoded m-bit parallel digital signals is maintained at p and a number of logic-0 bits of said encoded m-bit parallel digital signals is maintained at (mâˆ’p), where Cpm>2n and m>p>0; and a decoder coupled to said I/O driver which receives said encoded m-bit parallel digital signals and performs a decoding operation to said encoded m-bit parallel digital signals, so as to restore said n-bit parallel digital signals.