Electrets Selectrostatic Transducer TRIZ Cases
- Electrostatic Film Actuator Drive Circuit With Capacitive Voltage Boost
An isolation capacitor and diode boost low-voltage input into high actuator drive voltage, extending film actuator travel with safer circuitry.
- Multilayer Electret Actuator for Compact Long-Stroke Motion
Opposed electret fields in a stacked conductor-layer actuator deliver longer stroke in a compact, low-cost structure with simple manufacturing.
- Electret Capsule Hybrid Bias Circuit for Low-Noise Microphones
Hybrid diode-resistor biasing in an electret capsule cuts self-noise while preserving temperature stability for lower-cost high-end microphones.
- Electret Capsule Impedance Converter With Hybrid FET Biasing
Hybrid FET biasing with diodes, resistors, inductors, and capacitors cuts electret capsule self-noise while improving temperature stability.
- Series Condenser Microphone Circuit for Higher Sensitivity
Direct series connection of microphone units sums audio signals through one impedance converter, boosting sensitivity with less circuit complexity.
- ECM Digital Microphone Temperature Compensation Circuit
A voltage-reference compensation circuit stabilizes ECM digital microphone gain across temperature changes, improving noise cancellation.
- Acoustic Electret Transducer for 3D Motion Direction Sensing
Segmented acoustic receiving portions compare field changes to detect a moving object's 3D direction and velocity in real time.
- High-Voltage Capacitive Audio Driver for Low-Power Speaker Output
A high-voltage, low-current driver powers a capacitance electro-acoustic transducer to cut speaker power use while maintaining audio output.
- Electret Microphone Electrode Layout for Humidity Insulation
A zoned counter-electrode and polarizable film block moisture-driven creeping currents while preserving acoustic holes and electrode area.