KR19980030240U - Preamplifier and Low Pass Filter IC Test Equipment of Acoustic Detector Module - Google Patents

Abstract

The present invention relates to a test fixture of a preamplifier and a low pass filter hybrid IC used in a volume module of a pre-arranged towed sound detector, and more particularly, an integrated circuit forming an amplifier and a low pass filter of an acoustic module. And an inspection jig for measuring the circuit characteristics thereof.

The present invention is a printed circuit board having a pre-amplifier formed of a hybrid IC easy to mount and detach, and a socket for mounting and detaching a low pass filter formed of a hybrid IC; A signal input terminal for applying a test signal from an external measuring device to measure characteristics of the preamplifier and low pass filter pair; A differential input driving circuit formed on the substrate for converting a single input input from the signal input terminal into a differential input and inputting the differential input to the preamplifier and the low pass filter; A differential output conversion circuit formed on the substrate for converting a signal output to the differential output through the preamplifier and the low pass filter into a single ended output; A signal output terminal for applying an output from the differential output conversion circuit to an external measuring device; And it provides a test fixture comprising an external power supply terminal for applying power to the IC and the circuit elements in the printed circuit board.

Description

Preamplifier and low pass filter IC test fixture of sound detector module

The present invention relates to a test fixture of a preamplifier and a low pass filter hybrid IC used in an acoustic module of a pre-arranged tow type sound detector, and more particularly, an integrated circuit forming an amplifier and a low pass filter of an acoustic module. And an inspection jig for measuring the circuit characteristics thereof.

FIG. 1 is a block circuit diagram schematically showing a general sound detector as a device using a hybrid IC under test according to the present invention. The sound detector system detects an acoustic signal underwater and converts it into an electrical analog signal, and then again An acoustic sensor unit 300 for converting the signal into a digital signal and then transmitting the multiplexed signal; A towing cable 200 for connecting the acoustic sensor unit 300 to the ship; It is configured to include a ship 100 is connected to the acoustic sensor unit 300 by the towing cable 200.

At this time, the ship 100 is a signal processing unit 120 for transmitting the electrical signal received from the acoustic sensor unit 300, and a data processing unit for classifying, searching, and processing the electrical signal data received from the signal processing unit 120 ( On the other hand, it is responsible for the function of controlling the acoustic sensor unit 300.

In addition, the acoustic sensor unit 300 is a vibration isolation module (310) for attenuating vibration generated around the acoustic sensor unit 300 to prevent false signals, and the like, and the input analog signal as a digital signal. The signal transmission module 320 is converted and transmitted, the sound module 330 for detecting the sound signal, and the tail rope assembly 340 to finally damp the vibration is configured.

At this time, the preamplifier 332 constituting the main part of the acoustic module 330 is connected to the low noise amplifier 332a for amplifying the low noise signal applied from the hydrophone 331, and the low noise amplifier 332a. The low noise filter 332c connected to the sea noise compensation amplifier 332b for blocking the applied sea noise and compensating and outputting only the high frequency signal, and the low pass filter 332c for passing the applied signal only to the low frequency portion. And a current driver 332d connected to the low fat filter 332c and outputting an applied signal in a current form to prevent a signal attenuation occurring during long distance transmission.

The present invention relates to the preamplifier 332 and the low pass filter 332c of the above-described line array tow-type sound detector, and typically, hundreds of preamplifiers 332 and the low pass filter 332c are combined to form one. A sound detector is formed.

In this case, the preamplifier 332 is formed of a differential input amplifier circuit. Therefore, in order to test the characteristics of the circuit, the preamplifier 332 is connected to a single input by differential driving in addition to a normal signal analyzer. I need a circuit.

In addition, the preamplifier 332 and the low pass filter 332c formed of the plurality of hybrid ICs are small and require a large number of people and time to manually measure the ICs. There is a problem of hassle such as connecting additional circuits required.

In order to solve the above problems, the present invention is an inspection device for facilitating the characteristics test of the preamplifier and low pass filter formed of the above-described hybrid IC, comprising a long, removable socket of the IC, the differential input drive circuit An object of the present invention is to provide an inspection board device in which a furnace and a differential amplification output circuit are integrated.

1 is a schematic block diagram of a pre-arranged tow type acoustic detector to be measured according to the present invention;

Figure 2 is a block diagram showing in detail the sound module and vibration isolation module constituting the sound detector of FIG.

3 is a block diagram of a test jig according to the invention,

4 is a circuit formed in the inspection jig according to the present invention, Figure 4 (A) is a circuit diagram of a differential input driving circuit according to the present invention, Figure 4 (B) is a circuit diagram of a differential output conversion circuit according to the present invention. .

* Description of the symbols for the main parts of the drawings *

4, 5; socket for hybrid IC 10; printed circuit board

14; signal input terminal 28; signal output terminal

24; differential input drive circuit 26; differential output conversion circuit

In order to achieve the above object, the present invention is a device for testing the electrical characteristics of the hybrid preamplifier IC and low-pass filter IC constituting the acoustic module used in the pre-arranged towed sound detector, the preform formed by the hybrid IC A printed circuit board having a socket for mounting and detaching an amplifier and a socket for mounting and detaching a low pass filter formed of a hybrid IC; A signal input terminal for applying a test signal from an external measuring device to measure characteristics of the preamplifier and low pass filter pair; A differential input driving circuit formed on the substrate for converting a single input input from the signal input terminal into a differential input and inputting the differential input to the preamplifier and the low pass filter; A differential output conversion circuit formed on the substrate for converting a signal output to the differential output through the preamplifier and the low pass filter into a single ended output; A signal output terminal for applying an output from the differential output conversion circuit to an external measuring device; And an external power supply terminal for supplying power to the IC and a circuit element in the printed circuit board. A hybrid preamplifier IC and a row constituting an acoustic module for use in a towed towed sound detector, comprising: A jig for testing the electrical characteristics of the pass filter IC is provided.

EXAMPLE

Referring to the accompanying drawings, a preferred embodiment of the present invention will be described.

3 is a block diagram of a test fixture of the present invention.

Reference numeral 10 designates a printed circuit board of the present invention jig. Various components described later are mounted on the substrate 10 to form the jig of the present invention.

Reference numeral 34 denotes a power input terminal for supplying power to each circuit element of the inventive jig, the hybrid IC under test and the low pass filter IC. Since the IC and the circuit of the present invention are formed using an operational amplifier, as an embodiment, three terminals of + 15V, -15V, and ground are formed.

Since the preamplifier and low pass filter of the acoustic module of the acoustic detector to which the present invention is applied are formed of a hybrid IC, the IC socket 4, which is provided on the printed circuit board 10 of the jig of the present invention, to measure the IC, 5) Insert each of the above ICs and measure them.

At this time, the IC sockets 4 and 5 are preferably 3M's trade name Textool, and the sockets are soldered to the substrate 10.

The IC to be measured is inserted into the IC socket, and a measurement signal is input from an external measuring device through the signal input terminal 14 of the present invention.

The signal input through the signal input terminal 14 is applied to the differential input driving circuit 24 formed on the substrate 10 of the present invention. This circuit is responsible for converting a single input from the meter input from the signal input terminal 14 into a differential signal for input to the preamplifier and low pass filter.

In addition, since the output signal passing through the IC under measurement is of a differential type, a differential output conversion circuit 26 is formed on the substrate for converting the signal into a signal that is easily measured by the measurement instrument. This circuit is responsible for converting the signal output from the differential output via the preamplifier and the low pass filter into a single ended output and applying it to the measuring instrument via the signal output terminal 28.

A circuit example of the differential input driver circuit 24 is shown in Fig. 4A, and one embodiment of the differential output conversion circuit 26 is shown in Fig. 4B.

The preamplifier and low pass filter IC test fixture of the present invention sound detector module is simple in the electrical characteristics test of the hybrid IC used in the plurality of sound modules constituting the towed towed sound detector by the above-described configuration and its action. In addition, by providing an easy inspection jig provides an effect of significantly improving the efficiency of the inspection.

The jig of the present invention also achieves the effect of improving the reproducibility of the characteristic test of the hybrid IC under test by providing an integrated test jig formed by condensing various circuit elements necessary for the above-described test.

Although the present invention has been illustrated and described with reference to certain preferred embodiments, the present invention may be modified and modified in various ways without departing from the spirit or the field of the present invention provided by the following utility model registration claims. It will be readily apparent to one of ordinary skill in the art that it can be used.

Claims (1)

In the device for testing the electrical characteristics of the hybrid preamplifier IC and low-pass filter IC constituting the acoustic module used in the line array towed sound detector, A printed circuit board (10) having a socket (4) that is easy to mount and detach a preamplifier formed of a hybrid IC and a socket (5) that is easy to install and detach a low pass filter formed of a hybrid IC; A signal input terminal (14) for applying a test signal from an external measuring device to measure characteristics of the preamplifier and low pass filter pair; A differential input driving circuit (24) formed in the substrate (10) for converting a single input input from the signal input terminal (14) into a differential input and inputting the preamplifier and a low pass filter; A differential output conversion circuit (26) formed in the substrate (10) for converting a signal outputted through the preamplifier and the low pass filter to the differential output into a single ended output; A signal output terminal 28 for applying an output from the differential output conversion circuit 26 to an external measuring device; And, A hybrid preamplifier IC constituting an acoustic module for use in a towed towed sound detector, characterized in that it comprises an external power supply terminal 34 for applying power to the IC and circuit elements in a printed circuit board; Jig for testing the electrical characteristics of low-pass filter ICs.