JPS6228185U

JPS6228185U -

Info

Publication number: JPS6228185U
Application number: JP11862385U
Authority: JP
Priority date: 1985-08-01
Filing date: 1985-08-01
Publication date: 1987-02-20

Description

[Brief explanation of the drawing]

第１図は、この考案の一実施例を示すブロツク
図、第２図は、第１図を説明するための波形図、
第３図はサンプルホールド回路の構成図、第４図
は従来のレーダ装置における自動周波数追尾装置
を示すブロツク図である。図において１は電圧制御型局部信号発生器、２
はミキサ、３は周波数弁別器、４はループフイル
タ、５は誤差増幅器、６はサンプルホールド回路
、７は局発ドライバ、８は信号切換器、９はＡ／
Ｄ変換器、１０はＤ／Ａ交換器である。なお各図
中同一符号は同一または相当部品を示すものとす
る。 FIG. 1 is a block diagram showing an embodiment of this invention, FIG. 2 is a waveform diagram for explaining FIG. 1,
FIG. 3 is a block diagram of a sample and hold circuit, and FIG. 4 is a block diagram showing an automatic frequency tracking device in a conventional radar device. In the figure, 1 is a voltage-controlled local signal generator, and 2 is a voltage-controlled local signal generator.
is a mixer, 3 is a frequency discriminator, 4 is a loop filter, 5 is an error amplifier, 6 is a sample hold circuit, 7 is a local oscillator driver, 8 is a signal switch, 9 is an A/
A D converter, 10 is a D/A exchanger. Note that the same reference numerals in each figure indicate the same or equivalent parts.

Claims

[Scope of utility model registration request]

A voltage-controlled local signal generator that generates a local signal for the radar device, a microwave mixer that mixes this local signal frequency with the transmission signal frequency of the radar device, and a frequency discriminator that converts the mixer output frequency into a frequency error signal. , a loop filter that integrates the frequency discriminator output signal, an error amplifier that amplifies the loop filter output signal, a sample hold circuit that samples and holds the error amplifier output signal, and an A/D converter that converts the sample and hold circuit output signal. /D converter and A/D converter output signal to D/D converter.
A D/A converter that performs A conversion, a signal switch that switches the D/A converter output signal and the sample-and-hold circuit output signal, and a local driver that applies the signal switch output signal to the local signal generator. An automatic frequency tracking device in a radar device characterized by comprising: