Resonant Sine-Wave Generation With Phase-Synchronized D-Class Pulses
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Solution Overview
Problem
Conventional sine wave generators suffer from low efficiency due to significant energy loss in filtering out odd harmonics from square waves, which reduces the overall power delivery in medical and other applications.
Innovation Solution
A high-efficiency sine wave generator design incorporating a D-class amplifier and a resonator circuit, where the resonator oscillates at a desired frequency and is stimulated with synchronized square pulses to maintain amplitude, coupled with a control circuit to adjust pulse width and amplitude for efficient energy transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional sine wave generators use square wave filtering to generate sine waves, then sine wave generation is achieved, but significant energy is lost in filtering out odd harmonics
Solution Approach 1:
Instead of generating a square wave and filtering out harmonics (conventional approach), the invention inverts the approach by directly generating a sine wave using a resonator circuit that naturally produces sinusoidal oscillations. This eliminates the need for filtering and the associated energy losses from harmonic rejection.
Solution Approach 2:
The invention employs a resonator circuit that operates at its natural resonant frequency to generate sine waves. By exciting the resonator at its resonant frequency, the circuit naturally produces sinusoidal oscillations with minimal energy loss, leveraging the physical principle of resonance rather than electronic filtering.
2Use of energy by stationary object
If D-class amplifier is used to generate energy pulses, then power efficiency is improved, but precise synchronization with resonator phase is required
Solution Approach 1:
The control circuit monitors the resonator's oscillation phase and uses this feedback information to precisely time the delivery of energy pulses from the D-class amplifier. This phase-locked feedback mechanism ensures that pulses are delivered at the optimal moment in each cycle, maximizing energy transfer efficiency while maintaining simple control logic.
Solution Approach 2:
The resonator circuit itself provides the timing reference for pulse delivery by its natural oscillation. The system uses the resonator's own phase information to control pulse timing, eliminating the need for external complex timing circuits or additional synchronization components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances power efficiency by synchronizing energy pulses with the resonator's phase, maintaining amplitude, and adjusting pulse characteristics, resulting in improved sine wave generation with reduced energy loss and increased power delivery.
Implementation Method 1
The resonator circuit is configured to receive energy pulses and to generate a resonator sinusoidal signal responsively to the energy pulses
Data Source
AI summary
A sine wave generator includes a resonator circuit, a control circuit and a pulse generator. The resonator circuit is configured to receive energy pulses and to generate a resonator sinusoidal signal responsively to the energy pulses. The control circuit is configured to estimate a signal measure of the resonator sinusoidal signal, or of a signal derived from the resonator sinusoidal signal. The pulse generator is configured to generate the energy pulses responsive to the signal measure estimated by the control circuit, and to drive the resonator circuit with the energy pulses.