Capacitance Measurements TRIZ Cases

Threshold-timed charge measurement detects small capacitance changes in vehicle door handles without high-resolution ADCs.

Two sensing layers and a differential circuit separate temperature drift from object proximity, improving capacitive detection accuracy.

Two reset phases and decoupling capacitors suppress noise, offset, and charge injection in differential capacitance measurement.

Reference-potential feedback and a variable capacitor cut switch operations, speeding capacitance detection while preserving accuracy.

A ground-isolated handle acts as a capacitive antenna to detect hand presence accurately and avoid false triggers in teleoperated control.

Inverse capacitance changes across fixed electrode pairs isolate actuator movement from electric field, temperature, and humidity effects.

Variable frame timing based on object distance improves capacitive detection accuracy without enlarging electrode area.

Repeated correction-mode amplitude shifts compensate shield capacitance changes, reducing temperature-driven detection errors.

Capacitance sensing on living plants is stabilized with adjustable thresholds, moving averages, and dwell timing to reduce false touch signals.

A relaxation oscillator measures on-chip capacitance from current, voltage, and frequency to improve accuracy, area, and settling time.

A slope-based baseline estimator suppresses thermal drift in capacitive proximity signals while preserving sensitivity to slow user approach.

Capacitance and impedance thresholds flag steering wheel electrode damage, improving driver hand contact detection accuracy.

By holding parasitic capacitances at a fixed potential, this fingerprint sensing circuit improves detection accuracy, lowers noise, and cuts power use.

A digital baseline filter suppresses temperature drift in capacitive proximity signals while preserving sensitivity during slow approaches.

A coupling capacitor shunts brief ESD voltage peaks from transistor base to emitter, preventing false proximity switch triggering.

One ferroelectric sensor combines pyroelectric, piezoelectric, and capacitive sensing to cut machine electronics complexity and cost.

Phase-jump and modulation-based evaluation sequences cut electromagnetic interference sensitivity in vehicle capacitive activation sensors.

Frequency-based on-chip capacitance sensing avoids long settling and large filter capacitors while enabling accurate, low-power crystal oscillator tuning.

Three set-based capacitance measurements isolate a target array element from row and column crosstalk for more accurate sensing.

A neutral-fiber support boosts piezoelectric output while avoiding multilayer complexity and preserving flexible transducer design.

Reset phases store offsets and noise on decoupling capacitors, improving capacitive readout sensitivity without driving the amplifier nonlinear.

Repeated charge-discharge cycles digitize capacitance without an ADC, cutting circuit complexity, power use, and interference sensitivity.

A shared sensing circuit switches between self- and mutual-capacitance modes to cut scan time, power use, and touch misjudgment.

Incremental integration-cycle passes and summed ADC readings reduce quantization error when measuring small capacitance changes.

Adaptive reference-based correction removes temperature and humidity drift from capacitance readings for more reliable proximity detection.

A two-stage baseliner uses sigma-delta switched-capacitor compensation to suppress parasitic capacitance and improve touch sensitivity.

Downscaled reference voltages let a CDC measure larger sensor capacitances with small integrated reference capacitors and no bulky external parts.

Frequency filtering suppresses out-of-band interference during charge conversion, improving capacitance sensing accuracy in electronic devices.

Downscaled sensor charging lets a CDC measure larger capacitances with small integrated references, avoiding bulky external capacitors.

A preset-voltage op-amp circuit prevents signal loss and supports mutual and self-capacitance touch detection without refresh-rate loss.

Opposed sensing units on both sides of a substrate cancel temperature-driven capacitance shifts and improve detection accuracy.

Multiple high- and low-resolution detection modes improve capacitance-based contact or approach sensing speed, precision, and gesture discrimination.

A paired temperature pad and reference-pad layout compensates capacitance drift, improving user proximity detection and reducing false absence readings.

Repeated charge-discharge cycles generate digital capacitance signals without an ADC, cutting power and cost while improving interference resistance.

A 2D capacitance sensor array images conductive patterns through non-contact coupling, improving defect detection precision without damaging traces.

A shared level shifter drives sensing and graylevel signals to resolve voltage mismatch while reducing silicon area and cost.

A switched-capacitor sigma-delta readout turns exponential charge buildup into a linear duty-cycle signal for accurate, noise-robust capacitance sensing.

A compensation electrode separates near-field environmental changes from object signals, improving capacitive sensing in rain and temperature shifts.

By switching sensor elements to vary effective area and spacing, the array holds a reference output with simpler, lower-power measurement electronics.

Baseline and contact-state capacitance measurements are corrected to improve contact detection accuracy across device-to-device sensor variation.

Differential sampling between a sensed capacitor and calibration capacitor improves capacitance measurement accuracy while reducing noise interference.

Side-mounted sensing circuits on a light-guiding assembly improve capacitance detection near the housing and reduce false actions in electronic devices.

Automatic per-channel capacitance calibration compensates wiring-length parasitics to equalize touch sensitivity and thresholds.

A filter passes switching-frequency components while sample-and-hold stabilizes node potential, improving capacitance detection under electromagnetic noise.

A chip-integrated capacitive electrode enables earbud wear and touch detection with better waterproofing, lower power use, and simpler assembly.

Two sensing units separate temperature drift from skin proximity, improving capacitance-based wear state detection in electronic devices.

Defined cable spacing around capacitive electrodes avoids false cable detection while preserving object sensing and collision clearance.

A sampled-and-averaged feedback loop cancels DC offset in capacitive sensor readout circuits, cutting noise and improving precision.

A single chip and electrode layer combine wear sensing and touch input in wireless earphones, cutting wiring, interference, cost, and assembly complexity.

A large-area grounding conductor closes the capacitance loop, enabling wearable sensors to detect indirect contact between conductors.