Op-Amp Compensation Circuit for Primary Pole Capacitance Boost

The patent changes the electrical parameters of existing circuit components (transistors and capacitors) to achieve the function of increasing primary pole capacitance. By adjusting the working states of transistors T3 and T4 and utilizing capacitor C1, the circuit achieves variable capacitance effect without adding physical capacitor area. This parameter change approach allows the equivalent capacitance to be dynamically adjusted while maintaining compact circuit area.

The patent introduces a control circuit as an intermediary between the existing circuit components and the primary pole. This control circuit, comprising transistors T3 and T4 and capacitor C1, mediates the capacitance effect by controlling the charge and discharge states of capacitor C1. The intermediary control circuit enables the existing components to work together to achieve the desired capacitance increase without requiring additional physical space for a dedicated capacitor.

The patent makes existing circuit components serve multiple functions. The transistors T3 and T4 and capacitor C1, which are part of the existing circuit structure, are utilized to provide both signal processing and capacitance compensation functions. This multi-functionality approach eliminates the need for separate external capacitors and reduces overall circuit complexity while maintaining the ability to improve operational stability.

The patent merges the capacitance compensation function with the existing circuit structure. By integrating the control circuit (transistors T3, T4 and capacitor C1) into the operational amplifier's internal structure, the patent combines multiple functions into a unified circuit design. This merging approach avoids the complexity of adding separate external components and creates a compact, integrated solution for improving stability.