Patent Number: 7,612,605

Title: Bootstrap voltage generating circuits

Abstract: A bootstrap voltage generating circuit includes a bias circuit having a first end coupled to a first power source node having an operation voltage, and a second end coupled to a low voltage reference potential, wherein a voltage at the first end is related to the operation voltage in a non-linear way; a charging capacitor having a first end coupled to the load circuit; a charging path between a second end of the charging capacitor and the first end of the bias circuit, wherein the charging path is responsive to a clock signal; a discharging path between the second end of the charging capacitor and the low voltage reference potential, wherein the discharging path is responsive to the clock signal; and a switch circuit connected to the first end of the charging capacitor for setting a voltage thereon, wherein the switch circuit is responsive to the clock signal.

Inventors: Chou; Shao-Yu (Chung-Li, TW), Chen; Yen-Huei (Hsin-Chu, TW), Wu; Jui-Jen (Hsin-Chu, TW), Chan; Gary (Taipei, TW)

Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.

International Classification: G05F 1/10 (20060101); G05F 3/02 (20060101)

Expiration Date: 1/03/02017