Integrated High-Low Pass Network for Phase Shift and Attenuation
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Solution Overview
Problem
Traditional high-precision phase shift and attenuation circuits in electronic systems suffer from large circuit size, increased complexity, and inefficiency due to non-reusable unit circuits and parasitic effects, leading to high insertion loss and complexity.
Innovation Solution
A high- and low-pass network circuit with integrated amplitude-phase modulation, utilizing a high- and low-pass network phase-shift unit circuit and amplitude modulation unit subcircuits, including phase modulation switch transistors and amplitude modulation switch transistors, to achieve simultaneous modulation of amplitude and phase, reducing circuit size and parasitic effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional separate phase shift and attenuation circuits are used, then phase shift and attenuation functions are achieved, but circuit size becomes large and integration is limited
Solution Approach 1:
The patent combines separate phase shift circuits and attenuation circuits into a single integrated high- and low-pass network circuit. The circuit uses shared components (resistors R1-R4, capacitors C1-C4, inductors L1-L2) to simultaneously achieve both phase shifting and amplitude attenuation functions, eliminating the need for cascaded separate circuits and reducing overall circuit size.
Solution Approach 2:
The high- and low-pass network circuit serves multiple functions simultaneously: it provides phase shifting through high-pass/low-pass filtering, amplitude attenuation through resistive networks, and impedance matching. This multi-functional design allows a single circuit to replace what would traditionally require multiple separate circuits.
2Adaptability or versatility
If phase shift and attenuation circuits are cascaded, then both functions are achieved, but insertion loss increases and efficiency decreases
Solution Approach 1:
By merging phase shift and attenuation functions into a single integrated circuit, the patent eliminates the cascaded connection between separate circuits. The shared reactive components (capacitors and inductors) and controlled resistive networks work together in parallel rather than series, reducing cumulative insertion loss while maintaining both functions.
3Adaptability or versatility
If separate phase shift and attenuation circuits are used, then both functions are achieved, but parasitic effects increase and additional circuits are required
Solution Approach 1:
The patent integrates phase shift and attenuation functions into a single circuit architecture, reducing the total number of discrete components and interconnections. This consolidation minimizes parasitic effects from multiple separate circuits while achieving both functions through coordinated operation of shared components.
Data Source
AI summary
A high- and low-pass network circuit with integrated amplitude-phase regulation, including a high- and low-pass network phase-shift unit circuit and amplitude modulation unit subcircuits each including an amplitude modulation switch transistor and a resistor connected in parallel. The high- and low-pass network phase-shift unit circuit includes high-pass and low-pass network subcircuits. A first end of the high-pass network subcircuit is connected to a first end of the low-pass network subcircuit through phase modulation switch transistors M1 and M3. A second end of the high-pass network subcircuit is connected to a second end of the low-pass network subcircuit through phase modulation switch transistors M2 and M4. Body ends of M1 and M2 are connected through two amplitude modulation unit subcircuits. Body ends of M3 and M4 are connected through another two amplitude modulation unit subcircuits. A method for controlling such network circuit is also provided.