The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 18, 2003
Filed:
May. 12, 2000
Junichi Onodera, Kanagawa-ken, JP;
Nobuyuki Takagi, Kanagawa-ken, JP;
Masamichi Nakajima, Kanagawa-ken, JP;
Fujitsu General Limited, Kawasaki, JP;
Abstract
A dual-loop PLL circuit is provided with a clamping circuit an A/D conversion circuit a reference color burst outputting circuit a PLL circuit and phase detecting circuit The phase of a reference color burst KK outputted from the circuit is changed at a slice level SL, and the level SL is changed by a reference phase value in the phase detecting circuit The sampling clocks outputted from the PLL circuit to the A/D conversion circuit are converted to a signal of a frequency of 4 Fsc, and the phase of the signal can be changed continuously by using the reference phase value. In addition, since the phase of the sampling clocks can be adjusted to a desired value and the output signal of the A/D conversion circuit can be converted onto a prescribed color difference signal by a signal conversion circuit and outputted, the color difference signals can be demodulated easily with high accuracy.