An intercom antenna-LNA-coin cell battery powered integrated circuit

Abstract

The utility model discloses a kind of intercom antenna-LNA-battery powered integrated circuits belonging to intercom technical field, the integrated circuit is built by antenna, LNA circuit, button cell, the LNA circuit is electrically connected with antenna, button cell, low voltage detection circuit is connected in series between the button cell and LNA circuit, for monitoring the voltage of button cell, the LNA circuit is used to realize impedance and interference performance, the button cell is used to power supply to LNA circuit, the LNA circuit connection is equipped with radio frequency circuit.The utility model adopts the highly integrated design of antenna, LNA circuit, button cell, reduce volume equipment and facilitate carrying, LNA circuit realizes impedance and interference performance, reduce power consumption, improve signal transmission efficiency and sensitivity.

Description

Technical Field

[0001] This utility model belongs to the field of walkie-talkie technology and relates to an integrated circuit powered by a walkie-talkie antenna-LNA-button battery. Background Technology

[0002] In handheld walkie-talkie scenarios, the antenna, noise amplifier (LNA), and power supply circuit are the core components of the receiving system, and their performance directly affects the device's communication range, receiving sensitivity, and battery life. Traditional walkie-talkies design their antenna, LNA, and power supply circuit as independent modules, which has the following drawbacks:

[0003] 1. The antenna, LNA and power circuit are designed as independent modules, which will occupy space and make the device bulky, affecting the portability of the device;

[0004] 2. The antenna and LNA need to be connected by a wire, which increases the standing wave ratio (VSWR), makes the impedance easily unbalanced, and reduces the transmission efficiency of radio frequency signals.

[0005] 3. Traditional button batteries have low power supply efficiency, and the noise figure of the LNA increases significantly at low voltage, affecting the receiving sensitivity of the walkie-talkie.

[0006] Therefore, there is an urgent need for a highly integrated, low-power, and stable solution. Utility Model Content

[0007] This invention provides an integrated circuit for a walkie-talkie antenna-LNA-button battery power supply, aiming to solve the problems of existing walkie-talkies having separate modules, resulting in large size affecting portability, impedance imbalance reducing transmission efficiency, and poor receiving sensitivity.

[0008] To achieve the above objectives, this utility model provides an integrated circuit powered by a walkie-talkie antenna-LNA-button battery. The integrated circuit is composed of an antenna, an LNA circuit, and a button battery. The LNA circuit is electrically connected to the antenna and the button battery. A low-voltage detection circuit is connected in series between the button battery and the LNA circuit to monitor the voltage of the button battery. The LNA circuit is used to achieve impedance and interference performance. The button battery is used to supply power to the LNA circuit. The LNA circuit is connected to an radio frequency circuit.

[0009] Preferably, the radio frequency circuit is provided with a radio frequency output terminal RF-IN and a radio frequency input terminal RX.

[0010] Preferably, the LNA circuit includes a power supply input terminal RX-3.3V, a resistor R280, a transistor Q58, a capacitor C405, a resistor R307, a resistor R308, an inductor L61, and a capacitor C398. The power supply input terminal RX-3.3V is connected to the base of the transistor Q58 through the resistor R280. The collector of the transistor Q58 is connected to the RF output terminal RF-IN through the capacitor C405. The emitter of the transistor Q58 is grounded. A resistor R307 is provided on the power supply input terminal RX-3.3V. One end of the resistor R307 is connected to the collector of the transistor Q58 through the resistor R308. An inductor L61 is connected in parallel across the two ends of the resistor R308. A capacitor C398 is provided at one end of the inductor L61. The other end of the capacitor C398 is grounded.

[0011] Preferably, the LNA circuit further includes capacitor C32, capacitor C396, inductor L24, and capacitor C385. The RF input terminal RX is connected to the base of transistor Q58 through capacitor C32. Capacitor C396 is connected between capacitor C32 and the base of transistor Q58. Inductor L24 and capacitor C385 are connected in parallel between capacitor C32 and capacitor C396. The other ends of inductor L24 and capacitor C385 are both grounded.

[0012] Preferably, the power supply input terminal RX-3.3V is connected to capacitors C61 and C401, the other ends of which are grounded, and capacitor C397 is connected between the power supply input terminal RX-3.3V and resistor R280.

[0013] Preferably, the collector of the transistor Q58 is connected to a capacitor C399, and the other end of the capacitor C399 is grounded.

[0014] Preferably, a resistor R115 is provided between the power supply input terminal RX-3.3V and the collector of the transistor Q58.

[0015] The advantages of this utility model over the prior art are:

[0016] This utility model provides an integrated circuit for a walkie-talkie antenna-LNA-button battery power supply. It adopts a highly integrated design of antenna, LNA circuit and button battery, which reduces the size of the device and makes it easy to carry. The LNA circuit realizes impedance and interference performance, reduces power consumption and improves signal transmission efficiency and sensitivity.

[0017] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the connection structure of this utility model;

[0019] Figure 2 This is a circuit connection diagram of the LNA circuit in this utility model; Detailed Implementation

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0021] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0022] To achieve the above objectives, this utility model provides an integrated circuit powered by a walkie-talkie antenna-LNA-button battery, as shown in the reference. Figures 1 to 2 As shown, the integrated circuit is constructed from an antenna, an LNA circuit, and a button battery. The LNA circuit is electrically connected to the antenna and the button battery. A low-voltage detection circuit is connected in series between the button battery and the LNA circuit to monitor the voltage of the button battery. The LNA circuit is used to achieve impedance and interference performance. The button battery is used to supply power to the LNA circuit. The LNA circuit is connected to an radio frequency circuit.

[0023] In this embodiment, a spiral antenna is used to receive battery wave signals. Unlike traditional single antenna setups, this spiral antenna is an antenna module (e.g., an array) formed by arranging multiple antennas. An LNA circuit and a coin cell battery power supply are added to improve antenna sensitivity, enabling the reception of weaker electromagnetic signals. When the low-voltage detection circuit detects that the coin cell battery voltage is below 2.5V, it automatically triggers a sleep mode, extending the coin cell battery's battery life. The LNA circuit uses CMOS technology to build a low-noise amplifier with a noise figure ≤1.5dB, gain 12-18dB, and power consumption ≤3mA (supporting VHF / UHF dual-band). The spiral antenna is directly connected to the LNA input, with a VSWR ≤1.5, supporting the 136-470MHz frequency band, resulting in reduced overall power consumption. This integrated circuit highly integrates the antenna, LNA, and coin cell battery, reducing the insensitivity caused by signal loss from traditional wire connections, further miniaturizing the size and achieving portability.

[0024] Specifically, the radio frequency circuit is provided with a radio frequency output terminal RF-IN and a radio frequency input terminal RX.

[0025] The LNA circuit includes a power supply input terminal RX-3.3V, a resistor R280, a transistor Q58, a capacitor C405, a resistor R307, a resistor R308, an inductor L61, and a capacitor C398. The power supply input terminal RX-3.3V is connected to the base of the transistor Q58 through the resistor R280. The collector of the transistor Q58 is connected to the RF output terminal RF-IN through the capacitor C405. The emitter of the transistor Q58 is grounded. A resistor R307 is provided on the power supply input terminal RX-3.3V. One end of the resistor R307 is connected to the collector of the transistor Q58 through the resistor R308. An inductor L61 is connected in parallel across the two ends of the resistor R308. A capacitor C398 is provided at one end of the inductor L61. The other end of the capacitor C398 is grounded.

[0026] The LNA circuit also includes capacitors C32 and C396, inductor L24, and capacitor C385. The RF input terminal RX is connected to the base of transistor Q58 through capacitor C32. Capacitor C396 is connected between capacitor C32 and the base of transistor Q58. Inductor L24 and capacitor C385 are connected in parallel between capacitors C32 and C396. The other ends of inductor L24 and capacitor C385 are both grounded.

[0027] The power input terminal RX-3.3V is connected to capacitors C61 and C401. The other ends of capacitors C61 and C401 are grounded. A capacitor C397 is connected between the power input terminal RX-3.3V and resistor R280.

[0028] The collector of the transistor Q58 is connected to a capacitor C399, the other end of which is grounded. A resistor R115 is connected between the power supply input terminal RX-3.3V and the collector of the transistor Q58.

[0029] Description of electronic components in this embodiment:

[0030] Button battery: mainly used to power transistor Q58;

[0031] Transistor Q58: Radio frequency signal amplification (low noise amplifier LNA);

[0032] Capacitor C61: As a coupling capacitor, it allows radio frequency signals to pass through while isolating DC components;

[0033] Capacitor C401: Used for filtering button batteries to remove high-frequency noise from the power supply line;

[0034] Capacitor C405: Used for high-frequency signal coupling to ensure efficient signal transmission;

[0035] Capacitor C398: Performs power supply decoupling function to stabilize the operating point;

[0036] The function of capacitors C61, C401, C405, and C398 is to prevent DC components from entering the signal path and allow only AC signals to pass through.

[0037] Resistor R280: Connected in series with the power supply input terminal RX-3.3V or the base of the transistor to limit current and prevent overcurrent damage to the device;

[0038] Resistor R307: A low-resistance resistor used as the emitter negative feedback resistor or collector load of transistor Q58 to stabilize amplification gain.

[0039] Resistor R115: Connected between the power supply input terminal RX-3.3V and the RF output terminal RF-IN, it is a typical bias resistor that provides the quiescent operating point voltage to the base of transistor Q58;

[0040] The function of resistors R397, R307, and R115 is to limit the current and protect transistor Q58, and to set a precise voltage reference for voltage division.

[0041] The combination of capacitor 398 and inductor L61 achieves impedance transformation and maximizes power transmission efficiency;

[0042] The combination of capacitor 385 and inductor L24 achieves impedance transformation and maximizes power transmission efficiency;

[0043] Resistor R308: Used for RF impedance matching to ensure efficient signal transmission from the antenna to the amplification stage;

[0044] The working principle of the LNA circuit in this embodiment is as follows: The radio frequency signal is input from the radio frequency input terminal RX, and coupled to the base of the transistor Q58 through the DC blocking capacitor C61. After being amplified by the transistor Q58, it is output from the collector and coupled to the RF output terminal RF-IN through the capacitor C405. Among them, the resistors R115 and R307 provide a stable bias voltage for the transistor Q58, and the capacitors C398 and R399 form an impedance matching network to optimize the high frequency response. Through the transistor Q58, weak radio frequency signals (small signals) can be efficiently amplified, the signal strength can be improved, and low noise characteristics can be maintained at the same time.

[0045] LNA circuits feature low-noise amplification, optimized amplification of small signals, significantly improved signal-to-noise ratio, enhanced receiver sensitivity, reduced reflection loss, and ensure efficient transmission of RF energy.

[0046] In summary, this utility model provides an integrated circuit for a walkie-talkie antenna-LNA-button battery power supply. It adopts a highly integrated design of antenna, LNA circuit and button battery, which reduces the size of the device and makes it easy to carry. The LNA circuit realizes impedance and interference performance, reduces power consumption and improves signal transmission efficiency and sensitivity.

[0047] The technical principles of this utility model have been described above with reference to specific embodiments, which are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments; all technical solutions falling within the scope of this utility model's concept are protected. Other specific embodiments of this utility model that can be conceived by those skilled in the art without creative effort will also fall within the protection scope of this utility model.

Claims

1. An integrated circuit powered by a walkie-talkie antenna-LNA-button battery, characterized in that, The integrated circuit is composed of an antenna, an LNA circuit, and a button battery. The LNA circuit is electrically connected to the antenna and the button battery. A low-voltage detection circuit is connected in series between the button battery and the LNA circuit to monitor the voltage of the button battery. The LNA circuit is used to achieve impedance and interference performance. The button battery is used to supply power to the LNA circuit. The LNA circuit is connected to an radio frequency circuit.

2. The integrated circuit for walkie-talkie antenna-LNA-button battery power supply according to claim 1, characterized in that, The radio frequency circuit is equipped with a radio frequency output terminal RF-IN and a radio frequency input terminal RX.

3. The integrated circuit for walkie-talkie antenna-LNA-button battery power supply according to claim 2, characterized in that, The LNA circuit includes a power supply input terminal RX-3.3V, a resistor R280, a transistor Q58, a capacitor C405, a resistor R307, a resistor R308, an inductor L61, and a capacitor C398. The power supply input terminal RX-3.3V is connected to the base of the transistor Q58 through the resistor R280. The collector of the transistor Q58 is connected to the RF output terminal RF-IN through the capacitor C405. The emitter of the transistor Q58 is grounded. A resistor R307 is provided on the power supply input terminal RX-3.3V. One end of the resistor R307 is connected to the collector of the transistor Q58 through the resistor R308. An inductor L61 is connected in parallel across the two ends of the resistor R308. A capacitor C398 is provided at one end of the inductor L61. The other end of the capacitor C398 is grounded.

4. The integrated circuit powered by a walkie-talkie antenna-LNA-button battery according to claim 3, characterized in that, The LNA circuit also includes capacitors C32 and C396, inductor L24, and capacitor C385. The RF input terminal RX is connected to the base of transistor Q58 through capacitor C32. Capacitor C396 is connected between capacitor C32 and the base of transistor Q58. Inductor L24 and capacitor C385 are connected in parallel between capacitors C32 and C396. The other ends of inductor L24 and capacitor C385 are both grounded.

5. The integrated circuit powered by a walkie-talkie antenna-LNA-button battery according to claim 3, characterized in that, The power input terminal RX-3.3V is connected to capacitors C61 and C401. The other ends of capacitors C61 and C401 are grounded. A capacitor C397 is connected between the power input terminal RX-3.3V and resistor R280.

6. The integrated circuit powered by a walkie-talkie antenna-LNA-button battery according to claim 3, characterized in that, The collector of the transistor Q58 is connected to a capacitor C399, and the other end of the capacitor C399 is grounded.

7. The integrated circuit for walkie-talkie antenna-LNA-button battery power supply according to claim 3, characterized in that, A resistor R115 is provided between the power supply input terminal RX-3.3V and the collector of transistor Q58.

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