The IEEE 1076 language has been primarily designed for the description and the simulation of digital hardware systems. As such, it provides only limited capabilities when used in analog modeling. VHDL 1076.1 aims to enhance VHDL 1076 such that it can support the description and simulation of circuits and systems that exhibit continuous behavior over time and over amplitude. To provide a comprehensive mixed-signal description and simulation capabilities as an extension to the IEEE VHDL 1076 language. New IEEE Standard - Superseded. This standard defines the IEEE 1076.1 language, a hardware description language for the description and the simulation of analog, digital, and mixed-signal systems. The language, also informally known as VHDL-AMS, is built on IEEE Std 1076-1993 (VHDL) and extends it with additions and changes to provide capabilities of writing and simulating analog and mixed-signal models.