EN
News
Input Impedance of OPA1671IDB Amplifier IC
Categories:
OPA1671IDB Amplifier IC
Source:
Release time:
2022-12-30
The OPA1671IDB Amplifier IC input impedance is mainly the equivalent impedance of the circuit input. If we add a voltage source U at the input and measure the current I at the input, the input impedance Rin is U/I. The input can be thought of as the two ends of a resistor whose resistance is the input impedance.
For the same input voltage, if the input impedance is very low, a large current needs to flow, and the current output capability of the previous stage needs to be tested. If the input impedance is high, the required current is very small, which greatly reduces the burden on the current output capability of the previous stage. Therefore, add input impedance to your circuit design.
There is no difference between the input impedance and the common reactance element, which reflects the size of the resistance to the current. For a voltage-driven circuit, the larger the input impedance, the lighter the load of the voltage source, and the easier it is to drive without affecting the signal source. On the other hand, for a current-driven circuit, the smaller the input impedance, the lighter the load on the current source. When driven by a voltage source, the higher the input impedance, the better. When driven by a current source, the smaller the impedance, the better, and the impedance matching problem must also be considered.
Previous Page
Two roles of OPA1671IDB Amplifier IC
Next Page
Related News
8613632534755
Address: 12F, Building C, Tongjian Building, Nanyuan Street, Futian District, Shenzhen
