Appeal No. 2001-1912
Application No. 08/803,392
BACKGROUND
The invention is directed to a radio transceiver that can be completely integrated
into one IC chip. Claim 1 is reproduced below.
1. A radio on a single IC chip, comprising:
an antenna section for transmitting and receiving a plurality of high
frequency signals, said radio including means for transmitting and receiving said
plurality of high frequency signals in a time division duplex mode;
a single heterodyne down-conversion section coupled to said antenna
section, for down-converting directly from a first high frequency signal of said
plurality of high frequency signals to a low intermediate frequency signal;
a bandpass filter coupled to said down-conversion section;
a discriminator coupled to said bandpass filter for detecting a received
data signal from said low intermediate frequency signal;
an up-conversion section coupled to said antenna section, for up-
converting an information signal to a second high frequency signal of said
plurality of high frequency signals, said up-conversion section comprising a
portion of said down-conversion section;
a shaping filter coupled to an input of said up-conversion section; and
said down-conversion section, bandpass filter, discriminator, up-
conversion section and shaping filter integrated into said single IC chip, wherein
bandpass filtering operations are performed by components integrated into said
single IC chip.
The examiner relies on the following references:
Saito 5,734,970 Mar. 31, 1998
(filed Feb. 7, 1996)
Okanobu 2,296,610 July 3, 1996
(Published UK Patent Application)
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