Title:
通信受信機
Document Type and Number:
Japanese Patent JP3887018
Kind Code:
B2
Abstract:
A communications receiver such as an integrated zero IF receiver comprises an input for receiving an input signal and a zero IF frequency down conversion circuit coupled said input and constructed to provide quadrature related signals (I,Q) at a substantially zero intermediate frequency. In order to balance the signal paths, at least one capacitance in each of the quadrature related zero IF signal paths of the frequency down conversion circuit comprises at least two integrated capacitors connected in anti-parallel. By fabricating the integrated capacitances in this way the symmetry of the circuit is maintained which enhances significantly the second-order inter-modulation performance.
Inventors:
Moore Paul Anthony
Application Number:
JP52478696A
Publication Date:
February 28, 2007
Filing Date:
January 26, 1996
Export Citation:
Assignee:
Koninklijke Philips Electronics N.V.
International Classes:
H03D7/00; H04B1/26; H03D3/00; H03D7/14; H04B1/30
Domestic Patent References:
| JP1276907A |
Foreign References:
| EP0012730A1 |
Attorney, Agent or Firm:
Kosaku Sugimura
Norita Tomita
Junko Sugimura
Hiroshi Tokunaga
Kazuaki Takami
Umemoto Masao
Norita Tomita
Junko Sugimura
Hiroshi Tokunaga
Kazuaki Takami
Umemoto Masao