Two-Wire Microphone Ultrasonic Identification Circuit
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Solution Overview
Problem
Conventional microphones lack a matching recognition function, leading to ineffective pairing with electronic devices, causing inconvenience to users.
Innovation Solution
A two-wire type microphone with ultrasonic identification, incorporating an acoustic transducer, signal processing chip, ultrasonic generator, voltage/current acquisition circuit, bias power supply, amplifier, and encoding unit, which generates and encodes ultrasonic signals for remote authentication, utilizing the signal output terminal pin and ground pin for both power and communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional microphones are used without matching recognition function, then the device structure remains simple, but the microphone cannot be effectively recognized and matched with the electronic device
Solution Approach 1:
The patent applies preliminary action by equipping the microphone with an ultrasonic generator that emits identification signals before the microphone is fully installed or used. This allows the electronic device to detect and recognize the microphone in advance through ultrasonic signals, enabling automatic matching without requiring complex post-installation configuration or manual pairing procedures.
2Ease of manufacture
If separate power lines and communication lines are used, then the communication reliability is improved, but the manufacturing cost increases
Solution Approach 1:
The patent applies universality by designing the signal output terminal pin to serve multiple functions simultaneously - it acts as both a power supply line and a communication line. The terminal pin transmits both electrical power to the microphone and ultrasonic identification signals for device matching, thereby reducing the number of required connectors and wires while maintaining both power supply reliability and communication effectiveness.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively solves the matching issue between electronic devices and microphones through remote authentication, while also serving as a cost-effective solution by using the signal output terminal pin for both communication and power lines.
Implementation Method 1
an ultrasonic generator, for generating an ultrasonic signal
Data Source
AI summary
The invention discloses a two-wire type microphone with ultrasonic identification, comprising: an acoustic transducer for capturing an acoustic signal; a signal processing chip, connected to a signal output terminal of the acoustic transducer, wherein the signal processing chip comprises a signal output terminal pin, a ground pin and an ultrasonic generator, wherein the ultrasonic generator is the configured for generating an ultrasonic signal, and a control terminal of the ultrasonic generator is connected to the signal processing chip. The beneficial effects of the present invention includes: the ultrasonic signal generated by the ultrasonic generator is utilized to match the ultrasonic signal with the encoding unit in the signal processing chip for identification, and a remote authentication by the client is useful for matching the electronic device with the microphone. Furthermore, the signal output terminal pin and the ground pin are introduced into the microphone in the prior art, and the signal output terminal pin is also used for a communication line and a power line, thereby further saving the cost.