Collin E Connors

US Patent:

20030120922, Jun 26, 2003

Filed:

Dec 4, 2002

Appl. No.:

10/310374

Inventors:

NI Sun - Sunnyvale CA, US
Collin Connors - San Jose CA, US
Veronica Alarcon - San Jose CA, US
Hassan Hanjani - Fremont CA, US

Assignee:

Fairchild Semiconductor Corporation

International Classification:

H04L009/00

US Classification:

713/168000

Abstract:

A system and method for device authentication are disclosed. In one embodiment, a random security code is generated during a boot operation to verify authenticity of a device. The random security code may comprise a rolling code based on a static number and a seed number, where the static number does not change between successive boots and the seed number changes between boots. A random number generator algorithm may provide the seed number.

US Patent:

20150069956, Mar 12, 2015

Filed:

Sep 9, 2014

Appl. No.:

14/481493

Inventors:

- Cupertino CA, US
Shimon Elkayam - San Jose CA, US
Collin E. Connors - Cupertino CA, US
Liyu Yang - San Jose CA, US

International Classification:

H02J 7/00

US Classification:

320107, 320137

Abstract:

A charger circuit includes an interface connector that may be coupled to a power adapter that provides an input signal having an input voltage, and a buck-boost converter circuit that may be coupled to a battery having a charging voltage. At a given time, the buck-boost converter circuit operates in a mode in a group of modes based on a control signal, where the group of modes may include at least a buck mode and a boost mode. In particular, the charger circuit includes control logic that generates the control signal based on the charging voltage and a charging capability of the power adapter. Thus, if the charging voltage suitably exceeds the input voltage, the buck-boost converter circuit may operate in the boost mode. However, if the charging voltage is approximately less than or equal to the input voltage, the buck-boost converter circuit may operate in the buck mode.