JPH03106476U

JPH03106476U -

Info

Publication number: JPH03106476U
Application number: JP1433290U
Authority: JP
Priority date: 1990-02-15
Filing date: 1990-02-15
Publication date: 1991-11-01

Description

[Brief explanation of the drawing]

第１図は本考案の実施例のブロツク図、第２図
は複数のクロツク発生器を使用した実施例の図、
第３図は従来のこの種の追尾受信機のブロツク図
、第４図は追尾受信機内の信号の周波数スペクト
ラムの説明図である。１……ＲＦ和信号入力端子、２……ＲＦ差信号
入力端子、３……位相変調器、４……周波数変換
器、５……電圧制御発振器、６……ＡＧＣ増幅器
、７……第２の位相検波器、８……第１の位相検
波器、９……基準信号発振器、１０……９０度移
相器、１１……ＡＧＣループフイルタ、１２……
ＰＬＬループフイルタ、１３……誤差信号検出器
、１４……クロツク発生器、１５……周波数制御
回路、１６……増幅器、１７……誤差信号出力端
子、１８……復調信号出力端子。 FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a diagram of an embodiment using multiple clock generators,
FIG. 3 is a block diagram of a conventional tracking receiver of this type, and FIG. 4 is an explanatory diagram of a frequency spectrum of a signal within the tracking receiver. 1... RF sum signal input terminal, 2... RF difference signal input terminal, 3... Phase modulator, 4... Frequency converter, 5... Voltage controlled oscillator, 6... AGC amplifier, 7... Second phase detector, 8...first phase detector, 9...reference signal oscillator, 10...90 degree phase shifter, 11...AGC loop filter, 12...
PLL loop filter, 13...Error signal detector, 14...Clock generator, 15...Frequency control circuit, 16...Amplifier, 17...Error signal output terminal, 18...Demodulated signal output terminal.

Claims

[Claims for Utility Model Registration] 1. A phase modulator that modulates the phase of an RF difference signal from an antenna using a clock signal, and a combining circuit that combines an output signal of the phase modulator and an RF sum signal from the antenna. , a frequency converter that converts the frequency of the output signal from the synthesis circuit using a local oscillation signal and outputs the frequency converter, an AGC amplifier that amplifies the output of the frequency converter, and an output from the AGC amplifier that converts the frequency of the output signal from the synthesis circuit using a reference signal a first phase detector that detects and outputs the phase; a reference signal oscillator that outputs the reference signal; and a PLL loop filter that outputs a predetermined low frequency component of the output from the first phase detector. , a voltage controlled oscillator that is controlled by the output voltage of the PLL loop filter and outputs the local oscillation signal; a 90 degree phase shifter that changes the phase of the reference signal by 90 degrees and outputs the same; a second phase detector that detects and outputs the output from the 90-degree phase shifter; and a predetermined low frequency component of the output of the second phase detector that outputs a predetermined low frequency component and is added to the AGC amplifier. A tracking receiver that includes an AGC loop filter that controls a gain, and an error signal detection circuit that synchronously detects the output of the second phase detector with the clock signal, detects an error signal, and outputs the detected error signal. 1. A tracking receiver comprising: a clock generator that generates a clock signal; and a frequency control circuit that sends a control signal to the clock generator to control the frequency of the clock signal. 2. The tracking receiver according to claim 1, further comprising an output terminal for outputting the output of the first phase detector as a demodulated signal. 3. The tracking receiver according to claim 1 or claim 2, comprising a plurality of clock generators with different output frequencies, and a clock signal from any one of the outputs of the plurality of clock generators. A tracking receiver comprising a switch for selecting an output and applying a clock signal to the phase modulator and the error signal detector.