Title:
バッテリ給電ハンドセット装置用のコモンモード電圧発生器
Document Type and Number:
Japanese Patent JP2008507023
Kind Code:
A
Abstract:
A common-mode voltage generator for a battery-supplied apparatus is provided with a battery voltage ripple-insensitive sensor comprising a voltage dividing circuit and a number of hysteresis comparators, by means of which a battery voltage, or a fraction thereof is compared with a series of reference voltages. These reference voltages are derived from an on-chip voltage by means of said voltage dividing circuit. The hysteresis of said hysteresis comparators is larger than the ripple on said battery voltage. Further there is an adjustable regulation loop. The sensor detects a battery voltage range and adjusts the regulation loop on the basis of this range. The regulation loop provides an output commonmode voltage, which is equal to a fraction, preferably half the battery voltage.
Inventors:
Guyoume, de, cremu
Application Number:
JP2007520942A
Publication Date:
March 06, 2008
Filing Date:
July 06, 2005
Export Citation:
Assignee:
Koninklijke Philips Electronics N.V.
International Classes:
G05F1/00; G05F1/56; H04B15/00
Attorney, Agent or Firm:
Kenji Yoshitake
Hidetoshi Tachibana
Yasukazu Sato
Hiroshi Yoshimoto
Yasushi Kawasaki
Hidetoshi Tachibana
Yasukazu Sato
Hiroshi Yoshimoto
Yasushi Kawasaki