The Infrared Demodulation Circuit Using Low-Noise Amplifier
This circuit is designed to operate with an HgCdTe (mercury cadmium telluride) demodulation device, which is a critical component in infrared detection applications. The ability to cool the device to 77K enhances its sensitivity and performance, making it suitable for low-temperature applications such as infrared spectroscopy and thermal imaging.
The constant current biasing method ensures stable operation of the demodulation device, which is essential for maintaining linearity and minimizing distortion during signal processing. The input port is configured to facilitate optimal signal capture, ensuring that the incoming signals are efficiently directed to the demodulation device.
With a voltage amplification factor of 200, this circuit is capable of significantly boosting weak signals, making it effective for detecting low-level infrared signals. The bandwidth of over 1 MHz allows the circuit to handle a wide range of frequencies, which is crucial for applications requiring rapid signal processing.
The circuit's noise factor of 1.5 dB indicates a low level of noise introduction into the system, which is vital for maintaining signal integrity, especially in sensitive applications. The design considerations and components used in this circuit contribute to its overall performance, making it suitable for advanced detection and measurement tasks in various fields, including medical diagnostics, environmental monitoring, and military applications.
Overall, this circuit represents a sophisticated approach to infrared signal demodulation, leveraging the unique properties of the HgCdTe material and optimized design parameters to achieve high performance in demanding environments.This circuit uses the HgCdTe demodulation device which can be cooled to 77K in liquid nitrogen. It uses a constant current bias for the demodulation device which is connected to the input port. The voltage`s amplification factor is 200 and the bandwidth is above 1MHz. The noise factor is 1.5dB when use the typical demodulation device. This circuit uses two.. 🔗 External reference
Related Circuits
The microphone has high sensitivity in the audio range, but in the ultrasonic range, the sensitivity decreases rapidly. The receiver is very sensitive. To prevent overdriving and feedback due to the high sensitivity of the microphone in the audio...
A very high-power amplifier with 10 pairs of power transistors. It can utilize MJ15024 and MJ15025 or MJ21193 and MJ21194. These 20 transistors function as the final active components. The design is based on four integrated circuits: TL072, TL074,...
A circuit for isolating a variable resistor is presented. An optoisolator, which consists of an LED and a photo-conductive cell (or photoresistor), is utilized. The current flowing through the LED regulates its brightness, which subsequently dictates the resistance between...
This house FM transmitter for your stereo or any other amplifier provides a strong signal strength up to a distance of 500 meters with a power output of about. This FM transmitter is designed to enhance audio transmission capabilities for...
If two of these circuits are made in the same enclosure for stereo, then there can be a single power supply to run both of them. There should be a resistor in series with the incoming 9V+ lead so...
Power Amplifier Speaker Protection Circuit Schematic. When a power amplifier is switched on, a loud thump sound is often heard due to a sudden heavy discharge. The power amplifier speaker protection circuit is designed to prevent loud thump sounds during...