JPH0375648U

JPH0375648U -

Info

Publication number: JPH0375648U
Application number: JP13541489U
Authority: JP
Priority date: 1989-11-24
Filing date: 1989-11-24
Publication date: 1991-07-30

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示すブロツク図、
第２図は従来例を示すブロツク図である。１１…第１の入力端子、１２…第２の入力端子
、１３…第１のスイツチ、１４…第２のスイツチ
、１５…第１のフイルタ、１６…電圧制御発振器
、１７…第１のバンドパスフイルタ、１８…第１
の1/8分周器、１９…ループ用ミキサ、２０…Ｒ
Ｆ出力、２１…出力用ミキサ、２２…基準発振器
、２３…第２のフイルタ、２４…プログラマブル
デバイダ、２５…第１の位相比較器、２６…1/22
00分周器、２７…ローカル発振器、２８…第２の
バンドパスフイルタ、２９…1/2378分周器、３０
…第２の位相比較器、３１…第２の1/8分周器、
３２…第３のフイルタ、３３…フエーズロツクル
ープ、３４…第１のミキサ、３５…第１の分周器
、３６…第２の分周器、３７…第１のループフイ
ルタ、３８…第３の分周器、３９…第２のミキサ
、４０…第３のミキサ、４１…周波数設定器、４
２…第２のループフイルタ。 FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a block diagram showing a conventional example. DESCRIPTION OF SYMBOLS 11... First input terminal, 12... Second input terminal, 13... First switch, 14... Second switch, 15... First filter, 16... Voltage controlled oscillator, 17... First band pass Filter, 18...1st
1/8 frequency divider, 19...loop mixer, 20...R
F output, 21... Output mixer, 22... Reference oscillator, 23... Second filter, 24... Programmable divider, 25... First phase comparator, 26... 1/22
00 frequency divider, 27... Local oscillator, 28... Second band pass filter, 29... 1/2378 frequency divider, 30
... second phase comparator, 31 ... second 1/8 frequency divider,
32... Third filter, 33... Phase lock loop, 34... First mixer, 35... First frequency divider, 36... Second frequency divider, 37... First loop filter, 38... Third 3 frequency divider, 39...second mixer, 40...third mixer, 41...frequency setter, 4
2...Second loop filter.

Claims

[Claims for Utility Model Registration] 1. A programmable divider that varies the frequency division number based on a digital signal for performing FSK modulation, and a first divider obtained by dividing the output of this programmable divider and a reference frequency from a reference oscillator. a phase comparator that compares the phase with a frequency signal, a voltage controlled oscillator that generates a predetermined signal based on the output of this phase comparator, and a frequency-divided output of this voltage controlled oscillator and a reference frequency of the reference oscillator a first mixer that multiplies a second frequency-divided signal and applies its output to the programmable divider; and a third frequency-divided signal that frequency-divides the output of the voltage controlled oscillator and a reference frequency of the reference oscillator. a second mixer for multiplication; a phase lock loop for inputting an audio signal and a digital signal for FM modulation and outputting a local signal; An FSK modulator, comprising: a third mixer that obtains an RF output. 2. A programmable divider that inputs a predetermined set frequency and changes the frequency division number, a phase comparator that compares the phase between the output of this programmable divider and a predetermined reference frequency, and an audio signal and digital signal for FM modulation. In addition to having the function of inputting signals and performing FM modulation,
F according to claim 1, further comprising a voltage controlled oscillator that is controlled based on the output of the phase comparator and outputs the local signal.
SK modulator.