Resonator-Driven Sine Wave Generation Without Harmonic Filtering
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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 efficiency of the oscillator.
Innovation Solution
A sine wave generator comprising a D-class amplifier and a resonator circuit that generates square pulses synchronized with the phase of the resonator sinusoidal signal, where the D-class amplifier stimulates the resonator with pulses when the amplitude drops below a threshold, maintaining high efficiency by adjusting pulse width and amplitude to control voltage and current delivery.
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 output can be achieved, but power efficiency deteriorates due to significant energy loss in filtering out odd harmonics
Solution Approach 1:
Instead of generating a square wave and filtering out harmonics to obtain a sine wave, the invention inverts the approach by directly generating a sine wave using a resonator circuit excited by pulsed DC voltage. This eliminates the need for complex filtering circuits and significantly reduces energy loss associated with harmonic filtering.
Solution Approach 2:
The invention extracts and removes the filtering stage from the traditional square-wave-to-sine-wave conversion process. By directly exciting a resonator with pulsed DC voltage, the harmful harmonic filtering step is completely eliminated, thereby removing the source of energy loss and device complexity related to filtering.
2Stability of the object's composition
If continuous power delivery is used to maintain sine wave output, then output stability is improved, but energy consumption increases
Solution Approach 1:
The invention employs periodic pulsed DC voltage to excite the resonator circuit instead of continuous power delivery. The control circuit monitors the resonator's output and triggers pulses only when needed to maintain the sine wave, creating a periodic action that maintains output stability while minimizing energy consumption by allowing the resonator to oscillate naturally between pulses.
Solution Approach 2:
The control circuit implements feedback by monitoring the resonator's sinusoidal output and using this information to determine when to trigger the next pulse. This feedback mechanism ensures the output remains stable by maintaining the resonator's oscillation amplitude without requiring continuous power input, thereby reducing overall energy consumption.
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
The solution achieves high power efficiency by synchronizing energy pulses with the resonator's phase, reducing energy loss and maintaining sine wave quality, suitable for applications like cardiac ablation and impedance measurement.
Implementation Method 1
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
Data Source
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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.