CN219611784U

CN219611784U - Amplifier with half-duplex automatic receiving and transmitting function for interphone

Info

Publication number: CN219611784U
Application number: CN202320741041.0U
Authority: CN
Inventors: 魏志伟; 吴景煜
Original assignee: Quanzhou Dechunhe Electronic Technology Co ltd
Current assignee: Quanzhou Dechunhe Electronic Technology Co ltd
Priority date: 2023-04-06
Filing date: 2023-04-06
Publication date: 2023-08-29
Anticipated expiration: 2033-04-06

Abstract

The utility model belongs to the technical field of interphones, and particularly relates to an amplifier for an interphone with a half-duplex automatic receiving and transmitting function, which structurally comprises an interphone main body, wherein the interphone main body is connected with an amplifying assembly capable of increasing power and the half-duplex automatic receiving and transmitting function; the amplifying assembly comprises a shell, wherein a circuit substrate is fixedly arranged on the inner side of the shell, the outer side of the circuit substrate is fixedly connected with one ends of an electric connecting wire and two groups of feeder lines respectively, and the electric connecting wire and the two groups of feeder lines penetrate out of the outer side of the shell; when the interphone main body is in a transmitting state, the amplifier is idle or misoperation easily causes the power tube to generate large current to cause tube burning, so a current protection circuit is added, the current is controlled by the comparison amplifier F so as to not exceed a preset current value, and the current is prompted by the indicator lamp.

Description

Amplifier with half-duplex automatic receiving and transmitting function for interphone

Technical Field

The utility model belongs to the technical field of interphones, and particularly relates to an amplifier for an interphone with a half-duplex automatic receiving and transmitting function.

Background

The interphone can be used for communication without any network support, has no telephone charge, is suitable for occasions of relatively fixed and frequent communication, and consists of a shell, a host, a battery, a belt clip, a seat charger and an antenna, and has three main types: analog interphone, digital interphone, IP interphone;

the amplifier on the market is generally only power amplification, can not realize receiving and transmitting switching, is a unidirectional amplifying circuit, can only be used for unidirectional broadcasting, can not receive signals and can only be used for speaking and listening when the interphone is a half-duplex receiving and transmitting circuit;

the existing intercom equipment (interphone) generally changes low power into high power so as to achieve signal coverage, and for this purpose, the original low-power product can only be eliminated or used in other places, so that cost is wasted;

for this reason, it is necessary to provide an amplifier for interphone capable of increasing power and half-duplex automatic transmission/reception function.

Disclosure of Invention

First, the technical problem to be solved

In order to overcome the defects in the prior art, an amplifier for interphone with half-duplex automatic receiving and transmitting function is provided so as to solve the problems provided by the background art.

(II) technical scheme

The utility model is realized by the following technical scheme: the utility model provides an amplifier for an interphone with a half-duplex automatic receiving and transmitting function, which comprises an interphone main body, wherein the interphone main body is connected with an amplifying assembly capable of increasing power and the half-duplex automatic receiving and transmitting function.

Further, the amplifying assembly comprises a shell, a circuit substrate is fixedly arranged on the inner side of the shell, the outer side of the circuit substrate is fixedly connected with one ends of the electric connecting wires and the two groups of feeder lines respectively, the electric connecting wires and the two groups of feeder lines penetrate out of the outer side of the shell, the other ends of the two groups of feeder lines are respectively connected with an antenna and an interphone main body, and at least one group of indicator lamps and the circuit substrate are fixedly connected on the outer side of the shell.

Furthermore, the outer side of the circuit substrate is fixedly provided with a detection IC module, a first radio frequency switch, a radio frequency power tube, a second radio frequency switch, an LNA amplifier and a comparison amplifier respectively.

Further, the feeder is a fifty ohm feeder.

(III) beneficial effects

Compared with the prior art, the utility model has the following beneficial effects:

the working state of the amplifier is controlled by monitoring whether a signal is input or not:

when the interphone main body 1 initiates interphone, a detection IC module A in the amplifying assembly 2 recognizes signal input, controls the first radio frequency switch B and the second radio frequency switch D to be switched to a transmitting state, opens the radio frequency power tube C walk haltingly to press for working amplification, and prompts by the indicator lamp 26;

when the interphone main body 1 is in receiving state, the detection IC module A in the amplifying assembly 2 does not recognize the input signal, controls the first radio frequency switch B and the second radio frequency switch D to switch to receiving states, turns on the power supply of the LNA amplifier E to amplify, and prompts by the indicator lamp 26;

according to the above, the interphone which can increase power and is suitable for the half-duplex automatic receiving and transmitting circuit can be achieved.

When the interphone main body 1 is in a transmitting state, the amplifier is idle or misoperation easily causes the power tube to generate large current to cause tube burning, so a current protection circuit is added, the current is controlled by the comparison amplifier F so as to not exceed a preset current value, and the current is prompted by the indicator lamp 26.

Drawings

Other features, objects and advantages of the present utility model will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a circuit diagram of the present utility model;

in the figure: the interphone comprises an interphone main body-1, an amplifying assembly-2, a shell-21, a circuit substrate-22, an electric connecting wire-23, a feeder line-24, an antenna-25, an indicator lamp-26, a detection IC module-A, a first radio frequency switch-B, a radio frequency power tube-C, a second radio frequency switch-D, LNA amplifier-E and a comparison amplifier-F.

Detailed Description

Referring to fig. 1 and 2, the present utility model provides an amplifier for interphone with half duplex automatic receiving and transmitting function: comprises an interphone main body 1;

the interphone main body 1 is connected with an amplifying component 2 which can increase power and has a half-duplex automatic receiving and transmitting function.

The amplifying assembly 2 comprises a housing 21 (being a surrounding frame with a cavity);

the circuit board 22 is fixedly arranged (can be in a bonding, bolting mode and the like) on the inner side of the shell 21;

the outer side of the circuit substrate 22 is fixedly connected with one end of an electric connecting wire 23 (connected with a power supply and used for supplying power to an electric component) and one end of two groups of feeder lines 24 respectively; the electric connection wires 23 and the two groups of feed wires 24 penetrate out of the outer side of the shell 21 (connection ends can be arranged at the circuit substrate 22 and respectively connected with the feed wires 24 and the electric connection wires 23);

the other ends of the two groups of feeder lines 24 are respectively connected with an antenna 25 and the interphone body 1 (the antenna end position of the interphone body 1 is connected);

at least one set of indicator lamps 26 (which can be turned on red or green to indicate that intercom, reception, amplifier idling or misoperation are easy to occur, and the like) are fixedly arranged on the outer side of the shell 21 and electrically connected with the circuit substrate 22.

The outer side of the circuit substrate 22 is fixedly provided with a detection IC module a, a first radio frequency switch B, a radio frequency power tube C, a second radio frequency switch D, LNA amplifier E and a comparison amplifier F (as shown in fig. 2, a circuit flow of A, B, C, D, E, F and 26 specifically connected is provided).

Further, the feeder 24 is a fifty ohm feeder (for ease of manufacture under power assurance conditions).

The control mode of the utility model is automatically controlled by the controller, the control circuit of the controller can be realized by simple programming of a person skilled in the art, the supply of power also belongs to common knowledge in the art, and the utility model is mainly used for protecting a mechanical device, so the utility model does not explain the control mode and circuit connection in detail.

While the fundamental and principal features of the utility model and advantages of the utility model have been shown and described, it will be apparent to those skilled in the art that the utility model is not limited to the details of the foregoing exemplary embodiments, but may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. The utility model provides an amplifier for intercom with half duplex automatic transceiver function, includes intercom main part (1), its characterized in that: the interphone main body (1) is connected with an amplifying component (2) with the function of increasing power and half-duplex automatic receiving and transmitting;

the amplifying assembly (2) comprises a shell (21), a circuit substrate (22) is fixedly arranged on the inner side of the shell (21), the outer side of the circuit substrate (22) is fixedly connected with one ends of an electric connecting wire (23) and two groups of feeder lines (24) respectively, the electric connecting wire (23) and the two groups of feeder lines (24) penetrate out of the outer side of the shell (21), the other ends of the two groups of feeder lines (24) are respectively connected with an antenna (25) and an interphone main body (1), and at least one group of indicator lamps (26) and the electric connecting circuit substrate (22) are fixedly arranged on the outer side of the shell (21);

the detection IC module (A), the first radio frequency switch (B), the radio frequency power tube (C), the second radio frequency switch (D), the LNA amplifier (E) and the comparison amplifier (F) are respectively and fixedly arranged on the outer side of the circuit substrate (22).

2. An intercom amplifier having a half duplex automatic transceiving function according to claim 1, wherein: the feed line (24) is a fifty ohm feed line.