Systems and methods for clock distribution in a die-to-die interface

US9654090B2 · kind B2 · utility

Assignee

• QUALCOMM Incorporated · US

Inventors

• Thomas Clark Bryan · Carlsbad, US
• Alvin Leng Sun Loke · Fort Collins, US
• Stephen Knol · San Diego, US
• Gregory Francis Lynch · San Diego, US
• Tin Tin Wee · Singapore, SG
• LuVerne Ray Peterson · San Diego, US
• Yue Li · Baltimore, US

Key dates

• Filing date: Apr 25, 2016
• Grant date: May 16, 2017
• Expiry date: Apr 25, 2036

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01L2924/15311
• WIPO field: Semiconductors
• WIPO sector: Electrical engineering

Abstract

Circuits for die-to-die clock distribution are provided. A system includes a transmit clock tree on a first die and a receive clock tree on a second die. The transmit clock tree and the receive clock tree are the same, or very nearly the same, so that the insertion delay for a given bit on the transmit clock tree is the same as an insertion delay for a bit corresponding to the given bit on the receive clock tree. While there may be clock skew from bit-to-bit within the same clock tree, corresponding bits on the different die experience the same clock insertion delays.