The zero ohm resistance, also known as the jumper resistor, is a kind of resistance for special purposes. The zero ohm resistance is not really zero. Just because there is a resistance value, it has the same error precision as the conventional chip resistance.
Ohmic resistance for circuit board
The following summarizes a series of uses of zero ohm resistance on circuit boards.
- There is no function in the circuit, but it is only on the circuit board for the convenience of debugging or compatible design.
- It can be used as jumper. If a section of line is not used, it can be simply not pasted with the resistance.
- When the parameters of the matching circuit are uncertain, 0 ohm shall be used instead. During actual debugging, the parameters shall be determined, and then the components with specific values shall be used instead.
- When you want to measure the current consumption of a part of the circuit, you can remove the 0 ohm resistance and connect the ammeter to facilitate the measurement of current consumption.
- When wiring, if it is really impossible to connect, you can also add a 0 ohm resistance.
- Act as inductor or capacitor under high frequency signal. (Related to the characteristics of external circuits) For inductance, it is mainly used to solve EMC problems. For example, between ground and power supply and IC pin.
- Single point grounding (refers to that protective grounding, working grounding and DC grounding are separated from each other on the equipment and become independent systems respectively.)
- Fuse action.
- Single point grounding of analog grounding and digital grounding.