Receiver Circuit Control Using Amplitude and Zero-Crossing Windows
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Solution Overview
Problem
Existing receiver circuits face challenges in maximizing battery life due to high power consumption, particularly during signal demodulation and filtering processes, which affects the overall operating life of battery-powered radio systems.
Innovation Solution
A monolithically integrated circuit with a control circuit that includes a window comparator and a comparison unit to determine valid signals by comparing amplitude and zero-crossing thresholds, allowing the receiver circuit to be efficiently turned on or off based on signal validity, thereby reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the receiver circuit operates continuously to ensure signal reception, then the signal reception reliability is improved, but the battery life deteriorates due to high power consumption
Solution Approach 1:
The receiver circuit is controlled to operate periodically rather than continuously. The control circuit activates the receiver only during periods when signals are expected or detected, and keeps it inactive during other periods. This periodic operation pattern maintains signal reception reliability when needed while significantly reducing average power consumption to extend battery life.
Solution Approach 2:
The receiver circuit incorporates self-monitoring capabilities through the control circuit that automatically detects signal presence and adjusts operation accordingly. The system serves itself by autonomously determining when to activate or deactivate based on signal detection, eliminating the need for continuous operation while maintaining reliability.
2Duration of action of moving object
If the receiver circuit is turned off to save power, then the battery life is improved, but the signal reception capability deteriorates
Solution Approach 1:
The control circuit implements feedback mechanisms by monitoring signal detection status and adjusting the receiver circuit operation accordingly. When signals are detected or expected, the control circuit activates the receiver; when no signals are present, it deactivates the receiver to save power. This feedback-based control maintains signal reception capability while optimizing battery life.
Solution Approach 2:
The receiver circuit transitions from a static on/off state to a dynamic operation mode where the control circuit continuously adjusts the receiver's operational state based on real-time signal conditions. This dynamic control ensures the receiver is active only when necessary, preserving both battery life and signal reception capability.
3Measurement precision
If the receiver circuit processes all received signals to ensure accurate demodulation, then the demodulation accuracy is improved, but the power consumption increases
Solution Approach 1:
The control circuit applies partial processing by evaluating signals against activation criteria before initiating full demodulation processing. Only signals that meet certain thresholds or criteria trigger the full demodulation process, while others are rejected with minimal processing. This partial action approach maintains demodulation accuracy for valid signals while reducing overall power consumption.
Solution Approach 2:
The control circuit performs preliminary evaluation of received signals before committing to full demodulation processing. By pre-assessing signal validity, strength, or characteristics, the system determines whether full processing is necessary, thereby maintaining demodulation accuracy when needed while avoiding unnecessary power consumption for invalid signals.
Data Source
AI summary
A method for controlling a receiver circuit and circuit with a receiver circuit and with a control circuit is provided, whereby a received signal is demodulated and filtered. An amplitude value of the demodulated and filtered signal is compared with thresholds of a window comparator. A zero crossing of the demodulated and filtered signal is compared with time thresholds of a time window by a comparison unit. A first output value of the window comparator and a second output value of the comparison unit are logically combined, and wherein, via the logical combination, the receiver circuit is turned off if, within a period of time, the amplitude value is determined to be outside a window formed by the thresholds of the window comparator, or a zero crossing is determined to be outside the time window.