Circuit function
If an 8-bit DAC is used for bipolar output, the polarity-free voltage is only 1/128 resolution. To increase the resolution, an 8-bit DAC is still used, and only the inverter is added to the output, and the full-scale voltage resolution is 1/256.
Circuit working principle
The multiplying AD7523 is a basic DA converter. The reference voltage VR can be either positive or negative. It can be obtained with a +5V reference diode. If the stability is not high, it can be supplied by the power supply. The OP amplifier A1 is used for voltage conversion. When the POL terminal is at "H" level, the analog switch S2 is closed, S1 is turned on, and A2 is an inverting amplifier having a magnification of 1 and the output voltage is +5V. The inverse gain accuracy depends on the ratio of R2 and R3. The resistance of this circuit R2 and R3 is equal. After zeroing, use VR1 to adjust the A1 output to 4.98V and verify that even if the polarity changes, it will never change.
What is a miniature slip ring? Miniature slip rings are rotary electrical connectors that allow power and data to be transferred between a stationary and rotating structure. They are often used in medical, military, and aerospace applications where size and weight are critical factors.
A miniature slip ring typically consists of two parts: a stationary housing and a rotating contact assembly. The contact assembly contains the brushes that make electrical contact with the rotating structure, as well as the rings that conduct current or data.
The housing can be made from any number of materials, including metals, plastics, and composites. It is typically designed to be as small and lightweight as possible while still providing adequate strength and durability.
The contact assembly is made from precious metals such as gold or silver in order to provide good electrical conductivity.
Technology improves with the continuous development of precision machinery. The more sophisticated the equipment, the smaller the volume will be. And the space that can be accommodated for installing the slip ring is also very small. The key parts of some equipment are quite a district. Especially in the high-end military, aerospace and aviation fields. 360-degree rotation is required to transmit current and signals. And the installation space is greatly reduced. It is to make the equipment work more smoothly. Therefore, it is necessary to design the slip ring to be small and exquisite. Otherwise, it won't meet the needs of the installation.
At the same time, we have moved with the continuous development of science and technology. Various high-end precision instruments have been developed. It requires the slip ring to transmit the current amount of general power. Also often undertake the transmission of weak electrical signals and various weak signals. The transmission medium is wider, and the number of loops of the slip ring is increasing.
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