July 12, 2024
When designing a transmitter, the first consideration for the technical engineer is how to obtain the signal of interest and minimize the noise. Especially when measuring very small physical quantities, background noise signals such as conversion noise inherent in the conversion element will be more obvious, or even the measurement signal will be annihilated, which is a problem that transmitter engineers must solve. The design of the transmitter in the circuit should be very simplified, only in this way can the signal-to-noise ratio be well improved and controlled, so that the noise will not be amplified at the same time as the signal is amplified, and it will not fall into the vicious circle of noise trouble, the more the circuit is modified and more complex, and the complex circuit will bring more noise trouble. The research and development of transmitters also needs to consider the power consumption factor, and reducing power consumption while ensuring performance is a major test for technical research and development personnel. Only by solving this problem can we avoid bringing more difficulty to the subsequent circuit design. In the development process of the transmitter, it is necessary to select the appropriate components, and the design of the op amp and differential amplifier circuit with a good common-mode rejection ratio may be able to meet your power supply indicators. In addition, the circuit of the power supply must also be paid attention to, and its reliability should be paid attention to when designing.
