Search International and National Patent Collections

1. (WO2017039896) AREA AND POWER EFFICIENT SWITCHABLE SUPPLY NETWORK FOR POWERING MULTIPLE DIGITAL ISLANDS

Pub. No.:    WO/2017/039896    International Application No.:    PCT/US2016/044451
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Fri Jul 29 01:59:59 CEST 2016
IPC: G06F 1/32
H03K 19/00
Applicants: QUALCOMM INCORPORATED
Inventors: SHI, Chunlei
PU, Yu
EASTON, Kenneth, David
YUEN, Kendrick, Hoy, Leong
SAMSON, Giby
Title: AREA AND POWER EFFICIENT SWITCHABLE SUPPLY NETWORK FOR POWERING MULTIPLE DIGITAL ISLANDS
Abstract:
A switchable supply network for powering multiple digital islands. In one embodiment, a first digital island includes a first power collapsible circuit and a first retention circuit, and a second digital island includes a second power collapsible circuit and a second retention circuit. In a normal mode of operation, the first digital island is provided a first supply voltage and a second digital island is provided a second supply voltage higher than the first supply voltage. In a transition mode the second power collapsible circuit is powered down and the second supply voltage is lowered and provided to the second retention circuit. When the second supply voltage falls below the first supply voltage, the first power collapsible circuit is powered down. The second supply voltage is now provided only to the retention circuits, and is furthered lowered in a retention mode to a final retention voltage.