Title:
MODEM CIRCUIT AND CORDLESS TELEPHONE SET PROVIDED WITH THE SAME
Document Type and Number:
Japanese Patent JPH06104872
Kind Code:
A
Abstract:
PURPOSE: To reduce foldover noise generated in a DBM (double balanced mixer).
CONSTITUTION: An LPF 14 is provided in the front end of the DMB 10. The LPF 14 is provided with a high-band cut-off frequency near a carrier frequency fCAR and by inputting signals low-band filtered by the LPF 14 before to the DBM 10, signal input for generating the foldover noise is interrupted in the DMB 10 and thus the foldover noise is reduced.
Inventors:
MIYAGAWA SHOZO
Application Number:
JP13745993A
Publication Date:
April 15, 1994
Filing Date:
June 08, 1993
Export Citation:
Assignee:
ROHM CO LTD
International Classes:
H04B7/26; H04K1/04; H04M1/00; (IPC1-7): H04K1/04; H04B7/26; H04M1/00
Attorney, Agent or Firm:
Kenji Yoshida (2 outside)