VCII Tunable Impedance Circuit With Positive and Negative Simulation
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Solution Overview
Problem
Conventional voltage conveyor circuits are not suitable for use over a wide frequency range and require multiple components, making them inefficient for tunable impedance simulations and impedance multiplication applications.
Innovation Solution
A tunable impedance simulator and impedance multiplier circuit using a single second-generation voltage-mode conveyor (VCII) with selectable positive and negative impedance terminals, along with three passive impedances (Z1, Z2, Z3) configured to provide tunable active inductor, capacitance, and resistance simulations by adjusting resistor and capacitor values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional voltage conveyor circuits are used, then impedance simulation and multiplication functions are provided, but the frequency range is limited and component count is high
Solution Approach 1:
The VCII circuit is configured to perform multiple functions including impedance simulation, capacitance multiplication, and resistance multiplication through a single integrated structure. The same VCII circuit can simulate different impedance types (inductive, capacitive, resistive) by changing the configuration of the connected passive components, eliminating the need for separate circuits for each function and broadening the frequency range applicability.
Solution Approach 2:
The circuit employs tunable passive components (resistors and capacitors) connected to the VCII that can be dynamically adjusted to change the simulated impedance characteristics. By varying the values of these passive components, the circuit can adapt to different frequency ranges and impedance requirements, providing dynamic configurability without increasing the core circuit complexity.
2Manufacturing precision
If multiple active components are used for impedance simulation, then accurate impedance control is achieved, but circuit area and device complexity increase
Solution Approach 1:
The patent merges the functions of multiple active components into a single VCII circuit. The VCII integrates the functionality of what would traditionally require separate active components, achieving accurate impedance control through its internal structure while occupying minimal circuit area. The single VCII replaces what would otherwise be multiple discrete active components.
Solution Approach 2:
The VCII serves as a universal building block that can simulate different impedance types (inductive, capacitive, resistive) and perform multiplication functions. This multi-functionality eliminates the need for multiple specialized components, reducing the overall circuit area while maintaining precise impedance control through the single VCII's configurable parameters.
Data Source
AI summary
A tunable impedance simulator and impedance multiplier circuit and a system for configuring a second generation voltage-mode conveyor circuit (VCII) as the tunable impedance simulator and impedance multiplier are described. The tunable impedance simulator and impedance multiplier circuit includes one VCII having a positive input terminal connected to a voltage source, a negative input terminal connected to the voltage source, and an impedance terminal Z0. The impedance terminal Z0 can be either positive or negative. When the impedance terminal Z0 is positive, a positive active inductor, a positive capacitance multiplier, and a positive resistance multiplier may be implemented. When the impedance terminal Z0 is negative, a negative active inductor, a negative capacitance simulator, and a negative resistance simulator may be implemented.