The outstanding advantage of MEMS is that the three parts of sensor, actuator and processing circuit are integrated together by microelectronic technology to form a monolithic integrated sensor or system, and the large-scale mass manufacturing of sensor chips can be realized, which has been widely used in information, automotive, consumption, industrial control and other fields, and has become the strategic commanding heights of international competition. So how does a power amplifier provide an excitation signal for MEMS sensor testing?aigtek todayAetna ElectronicsLet's answer your questions
Studying the development process of sensors and MEMS, microfabricated devices just appeared in the sixties of the twentieth century, mainly researched new technologies and expanded applications in the seventies, produced more complex devices in the eighties, integrated sensitive systems in the nineties, and began to develop wireless microsystems after 2000.
What is a MEMS sensor?
Sensors are one of the essential components of today's digital world. Since all computing and processing is done on digital signals, there should be a medium between the analog world and digital electronic devices. Sensors bridge this gap because they are used to observe the temporal effects of simulated physical parameters and generate meaningful information (to computers).
The modern definition of a sensor can sometimes be confusing, but in simple terms, a sensor is a device that contains basic sensing elements that sense physical quantities such as temperature or humidity and convert them into electrical signals. A sensor also consists of a signal processing unit such as an amplifier, filter, or ADC, or a combination of these components.
Different types of MEMS sensors.
One of the main implementers of MEMS technology is the automotive industry. Modern cars use a large number of sensors, most of which are MEMS-based devices. Below is a list of MEMS sensors used in modern cars.
l Accelerometer for electronic stability control and airbag deployment.
l Inertial Measurement Units or IMUs (they are a combination of MEMS accelerometers and MEMS gyroscopes) - for measuring yaw, pitch and roll of autonomous driving.
l Magnetometer is used for the direction used in navigation.
l Pressure and inertial sensors are used for brake control.
l Pressure sensor tire pressure monitoring system.
l Airflow sensor for intake air monitoring.
l Fuel sensor fuel level indicator.
l Collision and collision sensors: Collision detection and airbag deployment.
LMEMS microphones are used for communication and noise cancellation.
l Temperature sensor for automatic climate control and engine temperature monitoring.
There are many other MEMS-based devices that are suitable for a variety of applications.
How does a pre-tiny signal amplifier provide an excitation signal for MEMS sensor testing?
Determine the input specifications of the MEMS sensor: including parameters such as frequency, power, impedance, etc.
Choose the right power amplifier type: According to the needs of the MEMS sensor, select the appropriate power amplifier type, and we often use the ATA-5620 pre-micro signal amplifier in the MEMS sensor test process to amplify the signal.
ATA-5620 pre-tiny signal amplifier
Bandwidth: (-3db) 1kHz 1kHz
Voltage: 2vp-p(50).
Voltage gain: 60db
Connecting the pre-microsignal amplifier and the MEMS sensor: Properly connect the output of the power amplifier with the input of the MEMS sensor.
Adjust the parameters of the power amplifier: According to the needs of the MEMS sensor, adjust the gain, output power, output impedance and other parameters of the power amplifier to ensure that the appropriate excitation signal is provided.
Perform the test: Test the MEMS sensor with the appropriate test instruments and software to observe its response and performance.
To learn about the pre-tiny signal amplifiers, follow: