High Frequency Amplifiers TRIZ Cases
- Multi-Stage RF Activation Circuit With Interstage High-Pass Coupling
Interstage capacitors block DC offset and near-DC noise in multi-stage RF detection, improving sensitivity, S/N ratio, and accuracy.
- Power Amplifier Bias Circuit for Linear Idle Current Control
Separating biasing and idle current control with an emitter follower and current mirror improves linearity, temperature stability, and variation tolerance.
- DC-Coupled RF Multi-Stage Amplifier Without AC Coupling Loss
Direct DC coupling between RF gain stages removes AC-coupling parasitics, preserving gain while reducing power use and silicon area.
- Two-Stage Microwave Power Amplifier Biasing for Low IM3
Dynamic biasing and post-distortion let a two-stage microwave power amplifier hold high efficiency while reducing IM3 across input power levels.
- Variable Gain Amplifier Feedback for Stable S11 and Gain Steps
Feedback-controlled current diversion keeps drain voltage and current stable, preserving S11, gain steps, and power across gain settings.
- Impedance-Transforming Amplifier Output for Lower Switching Loss
An impedance transformer and switchable reactance elements vary amplifier load impedance to cut switching loss and power consumption.