Multiple-Port Networks TRIZ Cases

A cascode amplifier and control current source vary inductance in high-frequency circuits without the 20 V DC source that raises cost.

A metal structure between acoustic wave resonators cuts substrate interference, improving filter isolation and attenuation steepness.

Parallel acoustic filters with hybrid couplers improve duplexer power handling, isolation, and PIM in compact base-station RF hardware.

A transformer-coupled bandpass filter suppresses VCO harmonics and phase noise in millimeter-wave output, cutting noise by 14 dB or more.

Near-field body-worn coils use the body's permittivity to cut path loss and power use while improving reliable wearable communication.

Real-time impedance control adjusts voltage, current, and power as plant resistance changes, improving electrical weed killing efficiency and safety.

Switching resistor and feedback values shortens audio settling time while preserving low-frequency content and recording performance.

Negative level shifting and robust pass gates let a shared balun fan out signals with lower distortion and better isolation at low supply voltage.

Combining acoustic wave resonators with LC resonators and transformers widens bandwidth while preserving sharp roll-off and out-of-band rejection.

Dual analog polyphase filters detect spectrum power imbalance to correct residual GHz frequency offsets and extend capture range to ±5 GHz.

Bypassing switch loss in CA mode with acoustic-wave resonator filter paths helps multiplexer circuits lower propagation loss and preserve RF signal quality.

Reducing reflector fingers near the common terminal suppresses stop band response and lowers adjacent-filter pass band insertion loss.

A phase detector tunes polyphase filter RC values in a feedback loop to keep quadrature clock phases accurate across multiple frequencies.

A combined RF tuner and multiplexer uses pi-network impedance matching to cut mismatch loss, reduce VSWR variation, and steady PA performance.

RC matching circuits in a CAN physical layer damp resonance and lower high-frequency impedance to cut power injection and improve EMC immunity.

A power-divider front end isolates overlapping passband filters so RF signals can transfer simultaneously with lower interference.

Using transistor gate-source capacitance and drain-source resistance, this case shrinks polyphase filters while enabling high-frequency impedance matching.

Common-mode feedback and frequency-shaped resistor-capacitor paths keep a differential linear amplifier linear and stable from low frequency to 20 Gbps.

Switchable impedance mismatch raises insertion loss at IMD frequencies in intra-band carrier aggregation, helping meet emission masks.

Series coupling capacitors and shunt L/C resonators create targeted harmonic notches while keeping passband insertion loss low.

Phase adjustment elements formed on filter substrates cut RF module size and insertion loss for multi-band carrier aggregation.

Switchable capacitors let one vehicle controller tune A/D input filtering for sensors with different frequency ranges and dynamic ranges.

A series resonator, parallel resonator, and inductor create attenuation poles that sharpen stop-band roll-off while reducing pass-band insertion loss.

Phase-shift elements tune duplexer impedance to cut return loss, insertion loss, and signal leakage in SH-wave acoustic filters.

Using one VCO with divider ratios 4-7, this receiver extends RF coverage across decades while correcting non-quadrature image errors.

An external carrier replaces the internal local oscillator, cutting receiver power while preserving sensitivity for continuous wireless reception.

By setting one series-arm resonator closer to its reflector and raising anti-resonance, this ladder filter improves steepness and duplexer isolation.

A low-pass filter and high-impedance bypass line suppress thermal and ground-loop noise while combining DC bias and RF readout on one coaxial cable.

Parallel resonator-inductor branches create multiple attenuation poles, widening RF stopbands while preserving low loss in the first passband.

A tunable RF filter bank isolates transmit and receive bands across carrier aggregation use cases, cutting switches, loss, area, and power.

PCM RF switches let factory-tuned RF filters reject unwanted frequencies with low insertion loss and no continuous power draw.

A non-capacitive connection circuit and choke coil suppress high-frequency noise transfer between analog and communication circuits.

Gap-aware DFE seeding preserves equalization across burst intervals, improving signaling margin and lowering bit error rates.

A reinforcement-learning controller tunes LMS convergence from residual errors and channel estimates to improve tracking in dynamic channels.

Magnetically coupled coils and parallel capacitors suppress multiple power-amplifier harmonics with less silicon area and circuit complexity.

A via assembly with an area-to-squared-length ratio above 3.25 cuts parasitic inductance in multilayer filters for better performance above 6 GHz.

Alternating RC and LR polyphase filter sections cut insertion loss and gain mismatch while preserving wideband quadrature signal generation.

A variable capacitance element lets one filter circuit switch between low-pass and high-pass modes while continuously adjusting frequency and phase.

Common-mode detection and phase adjustment cancel second harmonics in a wireless transmitter while avoiding bulky, low-Q on-chip filters.

A third inductor-capacitor branch lets an LC band-pass filter place attenuation poles below and above the pass band for sharper frequency characteristics.

Embedded stacked capacitor electrodes and a ground layer suppress board stray capacitance, preserving RF filter characteristics and lowering loss.

A differential amplifier and filter isolate touch noise and cancel common-mode interference to improve touch detection accuracy.

Independent switch control and a shunt termination resistor add a high-isolation state to RF phase shifters without extra insertion loss.

A phase shifter adjusts stub electrical length to maintain impedance matching across frequencies, reducing reflection in shared antenna systems.

Plate-like AlN powder and hot-press sintering achieve high c-plane orientation without rotating magnetic fields, lowering cost and complexity.

Integrated RC matching in a CAN physical layer shifts resonance and lowers high-frequency impedance to reduce DPI power injection and oscillations.

A switched diverter circuit redirects MRI-induced RF energy from implanted leads to a dissipating surface, reducing tissue-interface heating.

A filter between the local oscillator and frequency multiplier removes nearby noise tones to prevent intermodulation overlap in the signal band.

Dynamic pass-band and impedance tuning lets one duplexer cover multiple network bands while reducing component count, size, insertion loss, and separation issues.

A poly-phase filter boosts output voltage and phase sensitivity, improving temperature sensing resolution while cutting power use.