Title: Frequency modulation device
Application Number: 200510054600 Application Date: 2005.03.16
Publication Number: 1671039 Publication Date: 2005.09.21
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H03C3/00
Applicant(s) Name: Matsushita Electric Ind Co., Ltd. Address:
Inventor(s) Name: Kitsukawa Hiroyuki, Adachi Toshishi
Attorney & Agent: ma ying shao yali
Abstract:
     A frequency modulation apparatus 100 has a synthesizer 101 , a differentiator 102 that differentiates phase modulation data and generates differential phase modulation data, an adder 103 that adds together that differential phase modulation data and carrier frequency data fractional part K and generates addition fractional part K 1 , an input data operation section 104 that receives addition fractional part K 1 and carrier frequency data integer part M, generates integer part input data M 1 and fractional part input data K 2 , and provides fractional part input data K 2 to synthesizer 101 , and an integer part data delay section 105 that delays integer part input data M 1 before providing it to synthesizer 101 . Input data operation section 104 makes M 1 =M-1 and K 2 =K 1 1 when K 1<0, makes M 1 =M and K 2 =K 1 when 0<=K 1<1, and makes M 1 =M 1 and K 2 =K 1 -1 when 1<=K 1.
Time: 13