Switched-Cap High-Frequency Detector With Low-Power Clocked Sampling
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Solution Overview
Problem
Traditional communications systems consume significant power and use expensive, complex components to detect high frequency components in input signals, as they require amplification and rectification before comparison to a reference voltage.
Innovation Solution
A detector system with a detector stage and an amplifier stage that alternately operate in biasing and sampling phases, using low-frequency clocks to detect high frequency components without initial amplification or rectification, reducing power consumption and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional detection circuitry amplifies and rectifies the input signal before comparison, then the high frequency component can be detected, but the power consumption increases significantly
Solution Approach 1:
The patent extracts only the essential detection function from the traditional amplification-rectification-comparison chain. By removing the rectification stage and using a simplified detector stage that directly compares the input signal to a reference voltage, the circuit achieves detection functionality with significantly reduced power consumption while maintaining the ability to detect high frequency components
Solution Approach 2:
The patent changes the operational parameters of the detection circuit by eliminating the rectification process and operating the detector stage directly with the high frequency input signal. This parameter change allows the circuit to detect high frequency components without the power-intensive amplification and rectification stages, thus reducing overall power consumption while maintaining detection accuracy
2Measurement precision
If traditional detection circuitry uses amplification and rectification stages, then the high frequency component can be detected, but the device complexity and cost increase
Solution Approach 1:
The patent extracts and removes the complex rectification stage from the traditional detection circuitry. By keeping only the essential detector stage that directly processes the high frequency signal and compares it to a reference voltage, the circuit complexity is significantly reduced while maintaining the core detection functionality and accuracy
Solution Approach 2:
Instead of following the traditional approach of amplification then rectification then comparison, the patent inverts the approach by directly comparing the high frequency input signal to a reference voltage in the detector stage, eliminating the need for intermediate rectification and reducing overall circuit complexity
Data Source
AI summary
Devices, systems, and methods providing for improved detection of a high frequency component in an input signal are described. A detector includes a detector stage configured to receive an input signal and generate a detection signal that represents the input signal. The detector also includes an amplifier stage that configured to receive the detection signal from the detector stage and amplify the detection signal to generate an output signal that indicates whether the input signal includes a high frequency component. In some examples, the detector stage includes a switched cap detector and the amplifier stage includes a first switched cap amplifier and a second switched cap amplifier. In some examples, the switched cap detector and the first switched cap amplifier are operated responsive to a first clock signal, and the second switched cap amplifier is operated responsive to a second clock signal different than the first clock signal.