Title:
【発明の名称】線形化および集積化された周波数復調器
Document Type and Number:
Japanese Patent JP2002519918
Kind Code:
A
Abstract:
An approach for demodulating a frequency-modulated signal involves processing a frequency-modulated signal with a phase shifter network to provide a demodulated signal that has a relatively constant amplitude around the center frequency of the frequency-modulated signal and that exhibits a relatively linear phase change over an operational frequency range. Embodiments of the invention include a phase shifter network, using N number of cascaded all-pass filters, that receives as an input a limited amplitude signal and outputs a phase-shifted limited amplitude signal that is mixed with the limited amplitude signal. The phase shifter network may also comprise a low-pass bessel filter.
Inventors:
Peter, Strot
Lysi, Mohindra
Lysi, Mohindra
Application Number:
JP2000557539A
Publication Date:
July 02, 2002
Filing Date:
June 14, 1999
Export Citation:
Assignee:
Konin Krekka Philips Electronics NV
International Classes:
H03D3/02; H03D3/06; H03H7/19; H03H11/18; H03H7/18; (IPC1-7): H03H11/18; H03D3/06; H03H7/18; H03H7/19
Attorney, Agent or Firm:
Kazuo Sato (3 others)