JPS5826680U

JPS5826680U - Transmission circuit for fish finder

Info

Publication number: JPS5826680U
Application number: JP11918181U
Authority: JP
Inventors: 小西　猛博
Original assignee: 日本無線株式会社
Priority date: 1981-08-11
Filing date: 1981-08-11
Publication date: 1983-02-21
Also published as: JPS64621Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は魚群探知機用送信回路の送信繰り返し周期Ｔと
送信実効出力Ｗとの関係を示す特性線図、第２図は従来
の送信回路の要部結線図、第３図は本考案に係る送信回
路の結線図、第４図は第３図に示す回路の動作波形を示
すタイムチャート図、第５図は第３図に示す回路の動作
説明図である。Ｈ・・・送信トレンス、Ｊ・・・送受波器、Ｒ１・・・
電流制限抵抗、Ｔｒ５・・・発振回路用トランジスタ、
Ｔｒ５・・・スイッチ用トランジスタ、Ｔｒ７〜Ｔｒｌ
Ｑ・・・増幅器用トランジスタ、Ｔｒｌ　１．　Ｔｒｌ
　２・・・電流増幅器用トランジスタ、Ｔｒ１３〜Ｔｒ
１６・・・電力増幅器用トランジスタ、Ｔｒｉ・・・誤
差電圧増幅器用トランジスタ、Ｔｒ３．Ｔｒ４・・・電
流増幅器用。トランジスタ、Ｄｌ・・・温度補償用ダイオード、Ｒ２
，Ｒ３・・・分圧抵抗、　ＲＶ　ｌ・・・可変抵抗、Ａ
・・・送信出力低減設定値、Ｂ・・・出力制御電圧、Ｃ
・・・発振回路制御用入力信号、Ｄ・・・発振出力信号
、Ｅｌ・・・基準電圧、Ｒ２・・・送信電力用電圧、Ｅ
ｂ・・・電源電圧、ＥＲ・・・消費電圧、Ｋ・・・誤差
電圧、Ｅ、　Ｆ・・・発振出力信号、Ｇ・・・ケープゲ
イジ、β・・・帰還回路の定数。Figure 1 is a characteristic diagram showing the relationship between the transmission repetition period T and effective transmission output W of a transmission circuit for a fish finder, Figure 2 is a main part wiring diagram of a conventional transmission circuit, and Figure 3 is a diagram based on the present invention. FIG. 4 is a wiring diagram of such a transmitting circuit, FIG. 4 is a time chart showing operating waveforms of the circuit shown in FIG. 3, and FIG. 5 is an explanatory diagram of the operation of the circuit shown in FIG. 3. H...Transmission torence, J...Transducer, R1...
Current limiting resistor, Tr5...transistor for oscillation circuit,
Tr5...Switch transistor, Tr7 to Trl
Q...Amplifier transistor, Trl 1. Trl
2... Current amplifier transistors, Tr13 to Tr
16...Power amplifier transistor, Tri...Error voltage amplifier transistor, Tr3. Tr4...For current amplifier. Transistor, Dl...Temperature compensation diode, R2
, R3... Voltage dividing resistor, RV l... Variable resistor, A
... Transmission output reduction setting value, B ... Output control voltage, C
...Input signal for oscillation circuit control, D...Oscillation output signal, El...Reference voltage, R2...Voltage for transmission power, E
b...power supply voltage, ER...consumption voltage, K...error voltage, E, F...oscillation output signal, G...cape gauge, β...constant of feedback circuit.

Claims

[Scope of utility model registration request]

(1) In the transmission circuit of a fish finder with an adjustable transmission repetition period, when the transmission repetition period becomes smaller and the effective transmission output increases for a predetermined effective transmission output value, the transmission is performed using the transmission output reduction setting value as a reference. 1. A transmitting circuit for a fish finder, comprising a circuit configured to control output and maintain effective transmitted output at a predetermined value.

(2) Utility Model Registration In the transmitting circuit described in claim 1, an error occurs when the transmitting power supply line connected to the transmitting transformer is connected to the power source via the current limiting resistor and is compared with the reference voltage. A transmitter circuit for a fish finder, characterized in that it is branch-connected to a voltage amplifier and supplies the output signal of the error voltage amplifier as a control signal for oscillation output in comparison with a transmission output reduction setting value.