Title:
DISCRETE FILTER, SAMPLING MIXER, AND RADIO DEVICE
Document Type and Number:
WIPO Patent Application WO/2007/148693
Kind Code:
A1
Abstract:
Provided is a discrete filter capable of increasing degree of freedom of design
including a DC gain. A sampling mixer (100) includes: a control signal generation
unit (104) which generates a control signal including an SO signal; a Ch (6) which
successively integrates reception signals sampled by an LO signal frequency
as discrete signals; a plurality of Cr (7, 8) which successively integrate discrete
signals at a timing based on the control signal; Cb (15) which alternately integrates
the discrete signals successively integrated by the respective Cr (7, 8); and
a gain control capacitance unit (110) which has gain control capacitors (44,
45, 46) connected in parallel to the respective Cr (7, 8) and integrating the discrete
signal and a reset switch (47) for resetting the discrete signal of the gain control
capacitors (44, 45, 46) integrated in the past, upon connection between one end
of Cr (7) and Cb (15).
Inventors:
HOSOKAWA YOSHIFUMI
SAITO NORIAKI
SHIMIZU YOSHITO
ABE KATSUAKI
SAITO NORIAKI
SHIMIZU YOSHITO
ABE KATSUAKI
Application Number:
PCT/JP2007/062329
Publication Date:
December 27, 2007
Filing Date:
June 19, 2007
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
HOSOKAWA YOSHIFUMI
SAITO NORIAKI
SHIMIZU YOSHITO
ABE KATSUAKI
HOSOKAWA YOSHIFUMI
SAITO NORIAKI
SHIMIZU YOSHITO
ABE KATSUAKI
International Classes:
H03H15/00; H03D7/00; H03H19/00; H04B1/26
Foreign References:
| JP2004289793A | 2004-10-14 | |||
| US20030050027A1 | 2003-03-13 |
Attorney, Agent or Firm:
WASHIDA, Kimihito (Shintoshicenter Bldg.24-1, Tsurumaki 1-chom, Tama-shi Tokyo 34, JP)
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