Pulse Automatic Control TRIZ Cases

A hybrid analog-digital loop uses proportional and integral phase offsets to track jitter and plesiochronous drift at high data rates.

A global DLL with local small-range DLLs keeps leaf clocks aligned under PVT variation while cutting clock network area and power.

Digital divider compensation corrects oscillator drift from process and temperature variation while preserving clock accuracy and low jitter.

Shared PLL and reference clock routing increases PLL density, cuts pin demand, and flexibly feeds PMA modules and core logic.

Core-specific aging monitors rebalance voltage, frequency, and workload to limit NBTI wearout and prevent timing violations.

A MIMO digital filter corrects timing and gain mismatches in time-interleaved ADCs while adaptive frequency hopping keeps data conversion uninterrupted.

A reconfigurable DLL delay chain uses feedback-controlled delay paths to widen frequency range and suppress duty cycle distortion in DDR timing.

A GPS core shares its LC VCO clock with wireless IC cores, removing redundant oscillators while preserving signal quality.

Digital phase-domain delta-sigma modulation replaces analog phase detection to cut non-linearity and improve CMOS temperature sensing accuracy.

Synchronized mux and divisor control lets a clock divider switch output frequencies without glitches while preserving stable 50% duty-cycle timing.

Selectable I/O supply switching and buffer amplification let a microcontroller bridge multiple voltage domains without external level shifters.

Pre-programmed PLL settings and a powered analog section enable direct relock to a new frequency after low-power reset, cutting resume delay.

Intermittent capacitor charge-discharge replaces continuous current flow to correct duty ratio with lower power use and simpler circuitry.

Combining pulse coincidence and pulse counting lets a PLL detector react quickly to out-of-lock states while confirming lock precisely.

Discrete sampling of the received transducer signal adjusts transmission frequency to hold phase shift with lower current use.

An ADC-DAC loop filter with a parallel RC impedance keeps PLL stability while cutting capacitor size and die area in integrated circuits.

A bias circuit holds capacitor voltage and limits swing in a level shifter, reducing jitter and signal distortion across voltage domains.

Injection locking in a CMOS loop oscillator cuts PLL and DLL phase noise by isolating tail current sources through an RC filter.

A DLL control unit detects a sustained locked state and stops delay locking to cut current use while keeping clock synchronization stable.

Phase detection and delay control align master and slave transceiver clocks to minimize skew, simplify channel bonding, and cut silicon overhead.

A gate-controlled transistor clamps output swing in a low-power level shifter to prevent driver overvoltage while preserving high-speed operation.

Uses same-size pass and keep transistors with complementary outputs to manage near-threshold node contention and reduce translator area.

Bias-controlled delay and phase mixing counter power supply variation in memory clock paths, reducing jitter and preserving synchronization.

Combining integer-N and fractional-N PLLs with a mixer yields flexible LO clocks with accurate frequency and low phase noise.

Voltage clamping lets core MOSFETs shift core signals to I/O levels without overstress, reducing area and extra protection circuitry.

A delayed local oscillator reference and circulator improve single-antenna FMCW radar sensitivity by canceling leakage and phase noise.

A negative resistance circuit cancels resonator loss, enabling low-phase-noise mm-wave oscillation with wider tuning range and no frequency multipliers.

A monotonic delay line with phase interpolation enables precise clock edge placement, faster DLL locking, and lower power in forwarded-clock I/O.

A speed-of-light-referenced resonator and negative resistance circuit widen mm-wave tuning range while lowering phase noise and area.

A delay-line and edge-based feedback clock replaces PLL reference circuitry, cutting circuit scale, cost, and standby power in burst-mode recovery.

Sensor feedback adjusts PLL pump current and oscillator trim during vibration to maintain lock and reduce signal drift.

Pulse generation and selection shorten delay locked loop tracking by reducing repeated feedback needed to align input and output edges.

Frequency measurement and FSM-based calibration compensate DCO and TDC PVT shifts, reducing PLL noise and clock distortion.

A detection and one-shot trigger circuit restarts a stalled PLL VCO only when stable mode is detected, preserving loop stability.

Periodic TDC enabling in a digital PLL captures phase only near reference edges, cutting power use while preserving phase quantization accuracy.

Phase shifts are split into cycle-by-cycle increments so multiple output clocks can be adjusted instantly without glitches or loss of frequency lock.

Parallel signal sampling and delay-path selection replace slow PLL or DLL tuning, enabling fast, precise clock-data phase alignment.

Single-edge injection lets a delay-locked loop lock from maximum delay, avoiding false locking, pulse evaporation, and excess power use.

Selective oscillator stopping in a digitally controlled FLL cuts clock power and area while preserving lock through mode transitions.

A phase-adjusted sampling clock and filtered phase feedback cut CDR phase detection error without adding ADC samples or bits.

Uses the clock signal as both timing reference and power source to synchronize inputs, cut leakage, and support high-speed operation.

A secondary oscillator tracks elapsed time during battery removal, then speeds main clock counting to restore continuity without frequency characterization.

Filtered inverter outputs extract and combine the Nth harmonic from a ring oscillator to generate stronger terahertz signals on silicon.

Splitting estimated frequency error between an RF PLL and digital rotator improves OFDMA frequency correction with lower cost and power.

Regenerative dividers and multipliers generate coherent harmonics that simplify filtering and cut phase noise and mixer spurii.

Periodic crystal calibration lets one high-frequency quartz source generate accurate low-power clocks while reducing board space and crystal count.

Incremental clock phase shifts track spread-spectrum data rate changes while reducing random jitter and phase noise in recovery circuits.

A reset phase adjustment calculator counts reference clock periods to correct fractional-N PLL phase error during arbitrary synchronization.

A charge pump controller selects stored VCO gain models to keep PLL loop gain stable across a wide output frequency range.

A single deep-well level shifter uses shared differential stages and bias control to cut area and current while protecting transistor breakdown limits.

A delay replica model is tuned by phase comparison to match internal clock transfer delays, cutting DLL test time and improving synchronization.

Parallel switching paths shorten latch transition time while low-power hold paths cut current consumption in voltage level shifting.

A dynamic divide ratio in the PLL feedback loop attenuates jitter and noise spurs while avoiding complex analog circuitry.

Averaging phase differences across one divider cycle helps a PLL filter pulse-gap phase jumps without sacrificing tracking speed or buffer size.

A start-up impulse injection circuit excites an ultrasonic electromechanical device, then locks drive to measured resonance for faster start-up.

A shared static level shifter drives multiple dynamic level shifters to convert signals across voltage domains with less silicon area.

Stepwise frequency and voltage switching uses stored parameter tables to cut processor power while limiting noise and instability.

Transient connectivity limiting enables fast level shifting between voltage domains while cutting leakage and avoiding simultaneous pull-up and pull-down.

A programmable modulo circuit and stutter clocking vary PWM frequency while preserving phase, duty cycle, and sync accuracy.

Amplitude adjustment keeps frequency variation fixed across temperature-compensated tuning, improving sub-ppm oscillator stability.

A dual discharge and temperature compensation scheme fully resets the power-up detection node, preventing low-temperature initialization faults.

A VDL adjusts its supply voltage from the signal entry point to widen frequency range and reduce stages, buffers, layout, and power.

Noise-corrected phase detection and self-calibration improve clock alignment accuracy under jitter and process, voltage, and temperature variation.

Predictive front-clock edge filling moves missing-edge handling outside the PLL, improving stability and high-speed clock recovery.

Incremental delay-cell activation cuts current spikes, power draw, and voltage fluctuation in DLL and DCC clock timing circuits.

A two-stage conversion path boosts low-voltage input swing to speed output rise without larger transistors, while stabilizing levels and limiting current.

Comparator-guided clock-cycle tuning keeps VCO gain within range despite PVT variation, reducing jitter and phase error in PLLs.

An on-die LC clock trains an RC oscillator to hold reference accuracy, then shuts off the LC path to cut power and avoid external timing parts.

Staggered synchronous clock signals cut in-rush current and circuit noise in chemical sensor arrays, improving low-level detection accuracy.

Counter-based reference and target frequency comparison generates trim codes for autonomous oscillator calibration with less test time and die area.

Clocked inverter sampling stages resolve asynchronous PLL phase detection without metastability, hysteresis, dead-zone, or DPLL freezing.

Parallel low-pass filter paths with different gains and bandwidths help a PLL cut phase noise and jitter without sacrificing lock response.

Averaging delayed PLL control-word samples sustains clock accuracy and low jitter when the reference clock disappears.

Two added phase detectors let a deskew DLL avoid false locking on the wrong clock edge under jitter, improving sync reliability.

By splitting the capacitor inside and outside the IC, the resonant current path shifts outward to cut RF interference and protect reception sensitivity.

An MCU-based synchronous sampling controller aligns ADC timing with clocked peripherals, cutting latency and avoiding external logic.

Startup calibration of multiphase and vernier TDC paths corrects PVT-driven delay variation while reducing redundant delay elements.

Phase correction in a fractional-N PLL feedback path stabilizes divider-induced phase error to cut noise and spurs in wireless synthesizers.

Operation-state detection switches reset timing with the clock to preserve data during normal operation and enable fast initialization during faults.

Opposite-polarity phase steps and time-to-zero crossing measurements let a PLL calibrate bandwidth, damping, and offset errors more accurately.

Nested delay lines and programmable division generate multiple accurate clock frequencies while avoiding VCO phase noise and excess transistor count.

Wide PFD output pulses give the charge-pump more switching time, enabling higher-frequency PLL operation with better phase noise and jitter.

Service contracts and session mediation restrict resource operations, reducing unauthorized transactions against protected data stores.

Periodic PLL clock modulation spreads spectral energy across a wider band, lowering peak EMI while preserving signal integrity.

A level-shifting diode and boosted control node keep switch on-resistance stable across wide signal swings, reducing audio distortion.

Adaptive linear interpolation enables baud-rate PAM timing recovery while cutting analog clock control complexity and reducing clock phases from 64 to 16.

Using two samplers and phase interpolation, this case tracks pulse-center timing shifts with few sample points to preserve signal integrity and cut power.

A shared-pin serial-parallel interface cuts CDR and oscillator power while avoiding the startup latency of low-power serial links.

Only one delay cell is enabled at a time to keep DLL loading balanced and deliver more linear delay increments for clock synchronization.

A hyper ring oscillator lets the PLL generate multiple high-frequency internal clocks directly, cutting divider area and supporting low-voltage operation.

Parallel windowed phase comparison improves clock-data synchronization in high-speed links without precision delay circuits.

Switching between count shifting and delay modes keeps memory read data timing stable across low and high clock frequencies.

Integrated detection logic sweeps supply voltage to capture level shifter thresholds, improving cross-domain reliability with fewer characterization loops.

Output-potential sensing cuts off the input switch at a threshold, enabling flexible clock amplitude control with lower power and less through current.

A delay end signal stops DLL lock operation at the delay limit, preventing infinite loops, cutting power use, and preserving clock synchronization.

A cross-coupled latch with an SR stage cuts level shifter skew below 50 ps across voltage, process, and temperature corners.

A calibrated PLL separates and corrects repetitive phase disturbances to improve servo sector placement and stabilize self-servo writing.

Stored timing offset values let core and I/O clock domains resynchronize after wake-up without full link training, cutting time and power.

Integrated duty detection and delay control let this DLL restore clock duty ratio accurately while avoiding redundant correction paths and larger circuits.

Bias-controlled symmetric loads keep oscillator amplitude constant, widening tuning range and linearizing current-to-frequency response.

Capacitive coupling and a holding circuit shift CMOS logic between 0V and ±3V while keeping transistor voltage stress within safe limits.

A self-test module finds VCO frequency limits and sets divider conditions so one clock generator can cover a wide range with lower power.

A differential first stage limits voltage swing above source voltage to prevent transistor over-stress without an external LOW supply.

Post-correlation frequency correction improves IEEE 802.15.4 receiver SNR while lowering ADC resolution and circuit power.

Capacitive coupling between dual ring oscillators generates full-swing differential clocks with lower jitter, better noise immunity, and reduced power.

Disabling the charge pump during reference clock failure lets a PLL hold frequency and resume with minimal phase shift when the clock returns.

Uses an arbitrary external pin in test mode to reset and initialize memory logic under stable voltage without adding a reset pin.

A single replica delay unit aligns rising and falling clocks to cut DLL current, save area, and avoid jitter and extra locking time.

A threshold-linked constant current circuit offsets transistor variation to keep clock frequency stable across wide and low supply voltages.

Variable delay lines and PLL feedback minimize clock skew across component variations, enabling lower-cost tuning at manufacture or boot-up.

Programmable delay cells, multiplexers, and flip-flops shift PLL clock phases in user mode without glitches or system disruption.

A switchable delay unit and sigma-delta control compensate fractional-N PLL phase errors, improving signal purity with lower energy use.

Oversampled reconfigurable PLL computation spreads current transients, cutting RF spurs while enabling multi-standard wireless support.

Switched capacitors store transistor gate voltages in separate phases to cut random offset without larger chip area or slower display processing.

A capacitor-switched voltage doubler extends charge pump output in PLL and DLL circuits, enabling wider VCO frequency range from differential signals.

Pulse counting delays bias current reduction until crystal oscillation is stable, enabling early clock output without omission.

A captured master time-base value preserves PWM period information during external sync, preventing phase distortion and invalid count sequences.

A delayed feedback loop filters transient glitches in latch storage nodes, preserving data integrity against alpha particle and neutron soft errors.

A reference-voltage level shifter protects gate oxide limits while maintaining logic-to-I/O signal transfer across varying VDD_IO and scaled VDD_Logic.

A stepwise startup voltage drives the VCO toward lock faster and preserves PLL frequency when the reference signal is lost.

Compare PLL phase jitter in static and spread spectrum modes to determine dynamic phase offset under standardized test conditions.

Staged DLL power-down uses lock and noise checks to sequence circuit shutdown, reducing noise and preserving clock stability.

Multiple PLL output phases are pre-generated and switched from PFD results to correct sync shifts and keep pixel rows aligned.

A current compensation circuit counters loop-filter leakage in PLLs by detecting phase lead and stabilizing the VCO control voltage.

An initial delay monitor preloads the DLL delay code from phase difference data, cutting clock locking time for high-speed IC operation.

A frequency filter screens distorted external feedback clocks and switches to a stable source to keep clock generation synchronized and reliable.

A stored digital precharge calibration value lets a PLL re-lock faster after disable while cutting loop-filter leakage, power use, and noise.

Using only S flip-flops, this (N-1)/N prescaler expands contiguous divide ratios while reducing circuit count, power, and area.

Control voltage limits tied to output common mode keep a VCO in the varactor linear region, stabilizing PLL tuning across process variation.

Separate read and write DLL driving blocks with different delays widen timing margin and support higher-speed memory operation.

Low-amplitude crystal-output transitions enable the clock only when needed, preserving controller compatibility without pinout or firmware changes.

A synchronized internal clock path controls DRAM read latency precisely while avoiding bulky DLL circuitry and saving chip area.

Feedback-controlled oscillator frequency keeps a charge pump boost voltage stable across load and supply changes while reducing ripple and capacitor area.

An RC reset circuit delays hard and manual reset signals so connected devices can reach ready status without complex, costly circuitry.

A frequency-divided feedback clock cuts DLL operating current, transient noise, and duty cycle distortion while preserving timing accuracy.

Configuration data is read through LED output terminals by sensing off-regime signal values, cutting IC pin count without lighting the LEDs.

Half-phase blending corrects distorted clock duty with one delay loop, cutting layout area and current use in high-speed chips.

A source clock update keeps the memory DLL phase-aligned after long power-down periods, preventing lock failure and data timing errors.

Gate-voltage regulation makes ring-oscillator current track transistor threshold shifts, keeping clock frequency stable across voltage and temperature changes.

Multiple DLL clock phases plus selectable inversion keep analog and digital clocks synchronized while reducing sampling transients and area.

A correction circuit normalizes phase error words to offset PVT-driven slope, gain, and offset drift in phase-to-digital PLLs.

Two PLL stages switch between VCXO-based acquisition and TCXO-based cleanup to widen lock range while maintaining low-jitter clock output.

A stable reference voltage generator prevents low-VCC startup errors by enabling circuitry only after supply voltage reaches a reliable threshold.

A variable PLL reference and tunable delay elements cut DDS quantization and mismatch errors, improving edge placement and spur suppression.

Temperature-driven pull-up and pull-down control stabilizes DRAM cell plate and bit line precharge voltages while reducing current variation.

MUX-switched delay paths let a digital ring oscillator tune period with low jitter while cutting analog circuitry, area, and noise sensitivity.

Programmable in-situ launch and capture clocks improve at-speed delay fault testing accuracy across technologies without external testers.

Adjusting capacitor charge time through bias current lets the circuit detect crystal oscillation stability earlier and notify the CPU accurately.

Using one PLL plus SSB mixers and even frequency division, this case cuts UWB hopping power, area, and filter complexity.

Uses selected odd-numbered phase signals with a 180° average phase offset to prevent duty cycle distortion while reducing PLL/DLL power and VCO load.