Power Amplifiers TRIZ Cases
- RF Module Filter Sharing for Compact Multi-Band TDD
Shared filtering and switchable signal paths shrink a multi-band TDD RF module while keeping frequency characteristics satisfactory across bands.
- Adaptive DC-DC Boost Converter Filtering Ceramic Capacitor Noise
An acoustical noise suppression filter attenuates capacitor resonance in an adaptive DC-DC boost converter without added complexity or power loss.
- Balanced RF Front-End Coupler Layout for Low-Loss Mode Switching
Directional couplers replace RF switches in a balanced front-end to cut receive loss and noise figure while improving transmit efficiency.
- Bootstrap FET Power Switching With Reverse Current Blocking
Back-to-back FETs and a bootstrap capacitor switch high-side power quickly while blocking reverse current without charge pumps or transformers.
- Hybrid Planar Combiner Layout for Low-Loss Broadband Power Amplifiers
By moving impedance matching into the waveguide, this combiner cuts broadband losses while easing cooling and hermetic amplifier construction.
- Microwave Heat Spreader Grounding to Suppress Cavity Resonance
Multi-point grounding through a heat spreader and via holes suppresses shield cavity resonance while improving microwave module heat dissipation.
- SIMO Voltage Circuit Using Holding Capacitors to Shrink PMIC Footprint
Holding capacitors and local control loops let one PMIC generate multiple amplifier voltages at once while reducing wireless device footprint.
- RF Match Line Impedance Layout for Cavity Combiner Reliability
Adaptation lines and switching circuits keep cavity combiner amplifiers impedance-matched during failures, reducing losses and complexity.
- Schottky Barrier RF Switch Transistors for Lower IMD3
Integrated Schottky source and drain contacts in SOI RF switch transistors cut third-order intermodulation distortion and improve signal isolation.
- Millimeter-Wave Tracker Circuit for Shared PA Supply Modulation
Discrete voltage generation and parallel supply modulation let two millimeter-wave power amplifiers share a compact tracker circuit with higher PAE.
- 3D Inductor Assembly in RF Power Amplifiers to Cut Coupling Loss
A stacked 3D inductor between the active device and grounded capacitor replaces parallel lead wires, reducing coupling loss and improving RF amplifier efficiency.
- 3D Inductor Assembly for RF Power Amplifier Coupling Loss
A 3D inductor assembly replaces parallel lead-wire inductance in RF power amplifiers to cut electromagnetic coupling, signal loss, and efficiency drop.
- Transfer-Printed On-Chip Inductors for High-Q RF Integration
Separately formed inductors are transfer-printed onto semiconductor wafers to preserve high Q, cut parasitic resistance, and improve RF performance.
- Sutardja Transformer LNA for Low-Noise Gm Boost
A rotated multi-winding Sutardja transformer boosts LNA transconductance and current gain while cutting noise and power use.
- RF Amplifier Bias Networks for Efficient Power Back-Off
Multiple RF-isolated bias networks keep Doherty amplifiers efficient during power back-off by deep class-C biasing of transistor paths.
- Dielectric Filter Coupling Port Structure for Wider Bandwidth
A blind hole plus linked slots strengthens coupling to resonant cavities, cuts port delay, and expands dielectric filter bandwidth.
- Voltage-Tunable RF Transmission Line for Adaptive Impedance Matching
Voltage-controlled electrochromic permittivity lets an RF transmission line adapt impedance to offset aging and manufacturing variation.
- Multi-Stage GaN Amplifier Package With Opposed Stage Layout
Opposed two-stage GaN packaging with external impedance matching cuts amplifier footprint and broadens wireless infrastructure frequency range.
- Transformer Output Matching Circuit for Harmonic Loss Suppression
A transformer-based output matching circuit uses staged harmonic filters to cut unwanted bands while limiting matching loss in power amplifier modules.
- Flip-Chip Semiconductor Package With Exposed Heat-Dissipating Surfaces
Direct flip-chip bonding and exposed thermal surfaces cut parasitic effects, improve heat flow, and free the package bottom for external functions.
- Hybrid-Combiner Multiband Doherty PA for Low-Loss Carrier Aggregation
Wideband auxiliary amplifiers and hybrid couplers enable multiband Doherty amplification with lower insertion loss, size, and weight.