High-input-resistance-dc-voltmeter
This voltmeter utilizes several beneficial characteristics of the CA3160 BiMOS operational amplifier. It offers voltage measurement capabilities ranging from 10 mV to 300 V. The circuit is powered by a single 8.4-V mercury battery and, at zero input, consumes approximately 500 pA of current. Consequently, at full-scale input, the total supply current increases by 1000 pA.
The voltmeter circuit is designed around the CA3160 BiMOS operational amplifier, which is known for its low power consumption and high input impedance, making it suitable for precise voltage measurements without significantly affecting the circuit under test. The input voltage range of 10 mV to 300 V allows for versatility in applications, from low-level signal measurement to high-voltage diagnostics.
The power supply for this voltmeter is provided by a single 8.4-V mercury battery, chosen for its stable voltage output and compact size, which is ideal for portable applications. The low quiescent current of approximately 500 pA at zero input ensures minimal battery drain during idle periods, extending the operational life of the device.
When measuring at the full-scale input of 300 V, the current consumption increases by an additional 1000 pA. This increase is manageable and still maintains the overall efficiency of the circuit, ensuring that the voltmeter remains a practical solution for various measurement tasks.
The circuit design likely incorporates a high-impedance input stage to prevent loading effects on the measured circuit, and may include additional features such as a display interface and calibration adjustments to enhance usability and accuracy. Overall, this voltmeter design exemplifies a balance between low power consumption and high measurement capability, making it suitable for both laboratory and field applications.This voltmeter exploits a number of tbe CA3160 BiMOS op amp"s useful characteristics. The available voltage ranges from 10 mV to 300 V. Powered by a single 8.4-V mercury battery, this circuit, with zero input, consumes approximately 500 p,A. Thus, at full-scale input, the total supply current will increase by 1000 p,A. 🔗 External reference
The voltmeter circuit is designed around the CA3160 BiMOS operational amplifier, which is known for its low power consumption and high input impedance, making it suitable for precise voltage measurements without significantly affecting the circuit under test. The input voltage range of 10 mV to 300 V allows for versatility in applications, from low-level signal measurement to high-voltage diagnostics.
The power supply for this voltmeter is provided by a single 8.4-V mercury battery, chosen for its stable voltage output and compact size, which is ideal for portable applications. The low quiescent current of approximately 500 pA at zero input ensures minimal battery drain during idle periods, extending the operational life of the device.
When measuring at the full-scale input of 300 V, the current consumption increases by an additional 1000 pA. This increase is manageable and still maintains the overall efficiency of the circuit, ensuring that the voltmeter remains a practical solution for various measurement tasks.
The circuit design likely incorporates a high-impedance input stage to prevent loading effects on the measured circuit, and may include additional features such as a display interface and calibration adjustments to enhance usability and accuracy. Overall, this voltmeter design exemplifies a balance between low power consumption and high measurement capability, making it suitable for both laboratory and field applications.This voltmeter exploits a number of tbe CA3160 BiMOS op amp"s useful characteristics. The available voltage ranges from 10 mV to 300 V. Powered by a single 8.4-V mercury battery, this circuit, with zero input, consumes approximately 500 p,A. Thus, at full-scale input, the total supply current will increase by 1000 p,A. 🔗 External reference
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