Amplifiers Controlled By Light TRIZ Cases

Using one base signal and dual-phase lock-in detection, this case separates multiple optical signals without reference wiring or extra amplifiers.

An overload circuit detects excessive input current and diverts DC and AC components through separate shunt paths to prevent optical receiver distortion.

High-resistance wiring over light-receiving elements absorbs crosstalk noise while low-resistance sections preserve signal quality and high-frequency response.

Parallel transimpedance amplifiers with gain and offset control separate high-speed data and low-speed signals on one optical link.

Touch electrodes overlap common electrodes to add bezel-area keys without extra panels or circuits, enabling slimmer narrow-bezel displays.

Multiple integration stages and a coupling stage separate ambient light from reflected signals to improve proximity sensing accuracy.

Separate DC and AC shunt paths divert overload current in optical receivers, limiting distortion while preserving signal scaling.

Parallel transimpedance amplifiers with gain and offset control enable multilevel optical links to carry fast data and slow signals on one path.

A capacitive attenuation pad compensates photodiode parasitics so gain can vary without changing noise behavior or frequency response.

Precharge switching and feedback current control stabilize IR sensor AFE bandwidth, cut amplifier saturation, and speed settling.

A transimpedance amplifier and synchronous rectifier measure breathing inductance accurately while cutting power use and magnetic-field interference.

Dynamic transimpedance control and output limiting help a light receiving circuit avoid amplifier saturation while preserving weak-signal accuracy.

Gain adjustment equalizes differential photodiode outputs to prevent CMRR loss and waveform distortion in high-speed coherent receivers.

Frequency compensation and APD bias control let a low-speed APD receiver meet 10 Gb/s bandwidth and sensitivity needs at lower cost.

A capacitive attenuation pad lets a photodiode receiver handle weak and strong light pulses while preserving noise and frequency response.

An on-chip EMI sensor placed beside the photodetector captures local interference, helping distinguish noise, trace EMI events, and protect circuitry.

A parallel resistor and stored offset values let an APD current mirror measure optical power with higher speed and precision.

An equalizing circuit offsets TIA bandwidth loss, helping PIN optical receivers keep high sensitivity at 2.5 Gbps without APDs.

Active negative feedback lowers receiver input impedance to offset photodetector capacitance and extend high-speed optical bandwidth.

Deep n-well CMOS cells create internal photodiode bias in a dual-mode differential TIA, cutting external bias circuitry, noise, and sensitivity loss.

A thin film resistor placed in parallel with the bias pad suppresses resonance and preserves flat high-speed transmission in optical receivers.

Active integrator feedback and a bypass transistor cancel DC and low-frequency photodiode current, cutting noise and dynamic range demands.

Direct-current correction between photodiodes and differential amplification suppresses CMRR growth and preserves dynamic range in coherent optical reception.

Adjusting the resistor network division ratio preserves output pulse width and waveform matching during amplitude regulation in optical receivers.

A dummy-core RC load balances output impedance in a differential TIA, improving high-frequency mode conversion while reducing power use.

A comparator and signal detector keep the amplifier in shutdown under noise light, cutting false startup and power use.

A reference generator tracks the AC average voltage to hold cascode bias constant and suppress offset in single-ended to differential conversion.

A level monitor and squelching path isolates AC-coupled outputs to prevent secondary response and false LOS alarms in compact optical receivers.

A low-impedance open-loop transimpedance amplifier clamps photodiode voltage to speed infrared detection while cutting power and die area.

A fixed-bias FET bypasses excess photocurrent bit by bit, extending optical receiver dynamic range without Schottky diodes or filter circuits.

Dynamic switching between two reference voltages stabilizes comparator timing and reduces pulse width distortion in optical signal reception.

A common-emitter pre-amplifier with dynamic feedback current source handles push-pull RF currents with lower noise and high-speed sensitivity.

An auxiliary differential pair cancels series input impedance effects in high-speed optical TIAs, preserving gain while reducing noise and jitter.

Direct offset measurement and subtraction improve low-power optical signal accuracy while avoiding noisy negative supplies.

A decision-feedback equalizer corrects TIA-induced inter-symbol interference, extending optical receiver bandwidth without added noise.

Dynamic coupling of reset-transistor parasitic capacitance boosts image-sensor conversion gain while limiting noise and bandwidth loss.

A source-grounded MOS output stage widens voltage swing in photodiode transimpedance amplifiers while preserving low-voltage, low-power operation.

A positive-feedback TIA raises output impedance and offsets parasitic capacitance to boost bandwidth, gain, and sensitivity with lower power.

A dummy TIA mirrors process and temperature shifts, letting optical receivers set photodiode bias without probing active inverting inputs.

Dynamic offset control shifts the differential amplifier crosspoint to maintain optical sensitivity under dispersion and signal intensity changes.

A switching unit changes main amplifier input impedance to match line conditions across data rates, balancing gain, bandwidth, and bit error ratio.

A transistor-resistor output stage contains parasitic capacitance and filters high-frequency EMI to protect optical transceiver signal quality.

A photoreceiving buffer circuit uses a current mirror to equalize collector currents and set operating point voltages.

A logarithmic current-to-voltage converter compresses photodetector signals using multiple diodes and a voltage summer.

Integrating germanium waveguide heterojunction phototransistors within a CMOS SOI wafer resolves signal attenuation and crosstalk inherent to copper channels.

Solid-state amplifier integrates active core and doped cladding on one chip, reducing ASE noise and component count.

A photodiode optical sensor uses a current mirror circuit to amplify photocurrent and reduce junction capacitance for faster response.