Bilateral-current-source
This circuit employs a CA3193 precision operational amplifier to provide a current that remains consistent regardless of variations in the load resistance (RL). By configuring the input resistance (RI) to be equal to resistance R3 and setting resistance R2 to be approximately equal to the sum of resistances R4 and R5, the output current (h) can be expressed as: VlN (R4)/(R3) (R5). The circuit is designed to maintain a constant load current of 500 mA for load values ranging from 0 to 3 ohms.
The circuit utilizes the CA3193, which is known for its precision and stability in various applications. The operational amplifier is configured in a feedback arrangement that ensures the output current remains unaffected by changes in load resistance. The choice of resistors RI, R2, R3, R4, and R5 is critical for achieving the desired output characteristics.
In this configuration, RI is matched to R3 to ensure that the gain of the circuit is controlled effectively, while R2 is adjusted to be roughly equal to the combined values of R4 and R5, which stabilizes the output current. The relationship defined in the output current equation indicates that the output is directly proportional to the input voltage (VlN) and the resistance values, allowing for precise control over the current delivered to the load.
The design is particularly suitable for applications requiring a stable current source, such as in sensor applications or LED driving circuits, where fluctuations in load resistance could otherwise lead to inconsistent performance. The capability to maintain a constant current of 500 mA across a range of load resistances from 0 to 3 ohms makes this circuit a reliable choice for various electronic applications. Proper thermal management and power supply considerations should be taken into account to ensure optimal operation of the CA3193 in the intended application.This circuit uses a CA3193 precision op amp to deliver a current independent of variations in RL. With RI set equal to R3, and R2 approximately equal to R4 + R5, the output current, h. is: VlN (R4)/(R3) (R5). 500-I"A load current is constant for load values from 0 to 3ohm. 🔗 External reference
The circuit utilizes the CA3193, which is known for its precision and stability in various applications. The operational amplifier is configured in a feedback arrangement that ensures the output current remains unaffected by changes in load resistance. The choice of resistors RI, R2, R3, R4, and R5 is critical for achieving the desired output characteristics.
In this configuration, RI is matched to R3 to ensure that the gain of the circuit is controlled effectively, while R2 is adjusted to be roughly equal to the combined values of R4 and R5, which stabilizes the output current. The relationship defined in the output current equation indicates that the output is directly proportional to the input voltage (VlN) and the resistance values, allowing for precise control over the current delivered to the load.
The design is particularly suitable for applications requiring a stable current source, such as in sensor applications or LED driving circuits, where fluctuations in load resistance could otherwise lead to inconsistent performance. The capability to maintain a constant current of 500 mA across a range of load resistances from 0 to 3 ohms makes this circuit a reliable choice for various electronic applications. Proper thermal management and power supply considerations should be taken into account to ensure optimal operation of the CA3193 in the intended application.This circuit uses a CA3193 precision op amp to deliver a current independent of variations in RL. With RI set equal to R3, and R2 approximately equal to R4 + R5, the output current, h. is: VlN (R4)/(R3) (R5). 500-I"A load current is constant for load values from 0 to 3ohm. 🔗 External reference