US 9,813,064 B2
Apparatus for high voltage tolerant driver
Chia How Low, Simpang Ampat (MY); Chee Seng Leong, Wilayah Persekutuan (MY); and Yick Yaw Ho, Folsom, CA (US)
Assigned to Intel Corporation, Santa Clara, CA (US)
Filed by Chia How Low, Simpang Ampat (MY); Chee Seng Leong, Wilayah Persekutuan (MY); and Yick Yaw Ho, Folsom, CA (US)
Filed on Dec. 17, 2013, as Appl. No. 14/109,484.
Prior Publication US 2015/0171830 A1, Jun. 18, 2015
Int. Cl. H03K 3/01 (2006.01); H03K 19/0175 (2006.01); H03K 3/011 (2006.01)
CPC H03K 19/017581 (2013.01) [H03K 3/011 (2013.01); Y10T 307/305 (2015.04)] 20 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a first power supply;
a second power supply lower than the first power supply;
first and second transistors coupled in series and coupled to a bias signal and a pad;
a first pull-up transistor coupled to the first power supply and to the first transistor;
a pull-down transistor coupled to the second transistor; and
a second pull-up transistor coupled to the second power supply, the pull-down transistor, and to the second transistor, wherein the first pull-up transistor, the first and second transistors and the pull-down transistor form a first driver to operate in a first mode of operation, and the second pull-up transistor, the pull-down transistor and the second transistor form a second driver to operate in a second mode of operation.