Title:
カップリングキャパシタを備える4位相電圧制御発振器
Document Type and Number:
Japanese Patent JP4932572
Kind Code:
B2
Abstract:
A quadrature voltage-controlled oscillator comprises a first delay cell outputting first and second phase signals having a different phase; and a second delay cell outputting third and fourth phase signals having a different phase, the third and fourth phase signals crossing the first and second phase signals, respectively. The first delay cell includes a first differential voltage-controlled oscillator connected to a power supply and outputting the first and second phase signals; and a first coupling section including first and second coupling transistors connected to the first differential voltage-controlled oscillator and first and second coupling capacitors connected in parallel to the first and second coupling transistors, respectively, so as to be grounded, the first coupling section coupling the output phase signals. The second delay cell includes a second differential voltage-controlled oscillator connected to the power supply and outputting the third and fourth phase signals; and a second coupling section including third and fourth coupling transistors connected to the second differential voltage-controlled oscillator and third and fourth coupling capacitors connected in parallel to the third and fourth coupling transistors, respectively, so as to be grounded, the second coupling section coupling the output phase signals.
Inventors:
Kim, Jun Hoon
Re, Sangku
Oh, Namjin
Yoon, Socchu
Kim, Eunju
Park, Tajun
Re, Sangku
Oh, Namjin
Yoon, Socchu
Kim, Eunju
Park, Tajun
Application Number:
JP2007101064A
Publication Date:
May 16, 2012
Filing Date:
April 06, 2007
Export Citation:
Assignee:
Samsung Electro-Mechanics Co., Ltd.
Korea Advanced Institute of Science and Technology
Korea Advanced Institute of Science and Technology
International Classes:
H03B27/00; H03B5/12
Attorney, Agent or Firm:
Konobu Kato