Voltage differentiating circuit with ultra-low power consumption

Abstract

The invention belongs to the technical field of electronic circuits, and particularly relates to a voltage differentiating circuit with ultra-low power consumption. The circuit overcomes the defects that a traditional differentiating circuit is high in power consumption and large in error. The differentiator can differentiate triangular wave signals under ultra-low power consumption, the circuit structure is equivalent to directly solving an absolute value after VIN derives time, compared with a differential operation circuit formed by an operational amplifier, the differential operation circuit better meets design requirements, the circuit is simple and easy to implement, stability does not need to be considered, and the applicable input signal frequency is wider.

Description

technical field [0001] The invention belongs to the technical field of electronic circuits, and in particular relates to a voltage differential circuit with ultra-low power consumption. Background technique [0002] According to the development route of international semiconductor technology and the latest progress of integrated circuits, IoT smart nodes, including wearable devices, wireless communication, and implantable sensors are becoming more and more common. These smart nodes are usually composed of system integrated chips, including power management modules, energy sources, signal processing modules, communication modules, and sensors. For this type of chip, high efficiency, small size, and low cost are the goals it is constantly pursuing. Therefore, a fully integrated, adaptive, and low-cost power management circuit is a crucial part of the application of this type of IoT smart node. The energy harvesting system can collect external energy and use it for system powe...

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Problems solved by technology

[0004] Traditional passive differential circuits such as figure 1 , which is more suitable for the derivation of rapidly changing input signals, such as square waves, otherwise it will introduce large errors and is not suitable for this energy harvesting application scenario; while the differential circuit implemented by an operational amplifier, such as figure 2 , its output voltage is a negative differential component superimposed on the DC level. When processing the differential component, the DC information needs to be eliminated, otherwise it will affect the subsequent determination of the maximum power point. In addition, the introduction of the operational amplifier will inevitably lead to successful In the energy harvesting system, the output power will be greatly reduced. Therefore, the above two traditional differential circuits are limited by accuracy and power consumption.

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