Amplifier Modifications To Raise Efficiency TRIZ Cases
- Power Amplifier Module Feedback Control for TDMA Power Ramping
A detection and feedback loop keeps the supply transistor out of saturation during GSM power ramping, extending dynamic range and cutting heat.
- Auto-Zero Transimpedance Amplifier for Offset and Bias Compensation
Dual acquisition loops sample and cancel offset voltage and bias current, preserving high-speed transimpedance precision and stability.
- Fully Differential Amplifier Common-Mode and Offset Control
Independent feedback loops stabilize common-mode output and cancel continuous-time offset, preserving gain and dynamic range at low voltage.
- 3-Stage Amplifier Slew Detection for Faster Settling
A slew-detection switch shorts first-stage outputs during large-signal slewing to prevent charge buildup and cut settling time.
- High-Gain Amplifier Offset Correction by Double Sampling
Double sampling subtracts amplifier output samples to cancel offset before gain, preserving linearity and ADC dynamic range.
- Four-Phase Auto-Zero Amplifier Circuit for Low Glitch Offset Correction
A four-phase auto-zero amplifier calibrates each stage to stable references and shorts outputs to suppress clock feed-through glitches and noise.
- Multiband Doherty Amplifier With Cascaded Impedance Conversion
Cascaded transmission-line impedance conversion lets a Doherty amplifier keep gain and drain efficiency across multiple frequency bands.
- CMOS Cascode Power Amplifier With Body-Source Leakage Suppression
A body-source cascode structure cuts subthreshold leakage and power loss in CMOS power amplifiers while preserving high output power.
- OP-Sharing Amplifier Reset Circuit for Memory Effect Reduction
A reset circuit clears residual output potential between shared amplifier phases, cutting memory effects, power use, and layout area.
- Chopper Amplifier Capacitor Sharing for Bandwidth and Area
Shared capacitors handle both Miller compensation and notch filtering, cutting chip area in high-bandwidth chopper amplifiers.
- Current-Mode Instrumentation Amplifier Auto-Zero Offset Correction
An auto-zero circuit stores a correction voltage to cancel current mismatch in a current-mode instrumentation amplifier without chopper ripple.
- Rail-to-Rail Operational Amplifier With Offset Scattering for LCD Drivers
Switch-linked differential pairs spatially scatter offset voltage, reducing LCD stripe artifacts and amplitude deviation in 2H inversion driving.
- Dual-Path Chopper Amplifier with Interleaved Notch Filtering
Two interleaved chopping and notch-filter paths raise update frequency to improve amplifier stability without higher chopping noise or gain loss.
- P-Type Transconductance Amplifier Without Bias Resistors
Using only P-type transistors, this amplifier removes bias resistors and current-complex CMOS needs for organic analog circuits.
- Chopper-Stabilized Operational Amplifier for Zero Offset Sensing
Periodic input and output reversal cancels op-amp offset, cutting current sensing error in power MOSFET stages from 0.4 A to under 0.04 A.