Pulse Automatic Control TRIZ Cases

A digital PLL uses external timing and sensor data to stabilize on-chip oscillator frequency despite temperature, stress, and aging.

Oscillating path feedback measures delay variation across clock paths and generates compensation signals to keep semiconductor timing aligned.

A gated VCO loop spreads RF carrier energy above a minimum frequency to cut digital isolator emissions and meet FCC limits.

An accelerometer and adaptive filter cancel vibration-induced oscillator phase noise, reducing isolation weight, cost, and calibration time.

Odd-even divider control matches feedback clock period error to the reference, cutting phase noise and improving synthesizer jitter.

A capacitor-precharged inverter level shifter equalizes the tripping point to cut Data Dependent Jitter in high-speed transmitters.

A divider-free digital calibration circuit adjusts clock duty cycle without analog voltage measurement, reducing area and improving waveform robustness.

Controls feedback slew rate and pulse width in a sub-sampling PLL to keep bandwidth stable despite PVT-driven gain variation.

A bandpass crystal interconnect with a far-end load capacitor and on-die filtering cuts clock jitter and noise coupling in compact layouts.

A local PLL tracks a recovered master clock to align multi-die network ports without clock multiplexing, reducing noise, jitter, and latency error.

Integrated phase-difference measurements across transient and convergence periods improve PLL lock detection during damped oscillation.

A stored quasi-reference phase lets the circuit detect local oscillator drift and correct input-signal phase for more accurate distance measurement.

A clock detector, smoothing circuit, and PLLs keep memory module clocks stable through surprise host clock stops without glitches or long resets.

Presetting the LO divider and adjusting a programmable divider preserves local oscillator phase continuity across PLL sleep-wake cycles.

Additional slicer error signals let a CDR frequency detector capture larger clock offsets without widening loop bandwidth or risking lock loss.

A ring of capacitors and inductors stores more energy at lower voltage, helping semiconductor resonant tanks preserve SNR as feature sizes shrink.

An asynchronous input delay in PLL frequency detection offsets clock transitions to avoid metastability and keep bias-based timing correction reliable.

Distributed selectable capacitors and constant-toggle decoding widen RTWO tuning range while reducing code-dependent frequency errors.

A correction circuit uses temperature-change signals near the heater to offset OCXO frequency drift during power supply voltage changes.

Index-based oscillator trimming avoids parasitic RC distortion and long divider-based measurement time while enabling precise frequency calibration.

Lower-frequency local oscillators and staged passive mixing cut millimeter-wave receiver size and power while preserving multiband conversion.

A dual-PLL reference scheme creates an integer-free radar sweep range, suppressing fractional N spurs that can mask small targets.

Differential delay control keeps internal and reference clocks aligned under PVT variation, preventing data I/O timing errors at high transfer rates.

Programmable clock selection enables burst phase detection with near-zero locking time across multiple line rates and fractional frequencies.

A dual digital-analog delay locked loop compensates delay variations to align internal clocks and reduce phase skew at high frequencies.

Multiple coarse and fine judging signals speed clock-count convergence, improving time-measurement resolution and dynamic range without longer cycles.

Formal checks on ICG cell hierarchy expose clock deadlock risks early, helping IC designs preserve low power without unreliable clock behavior.

One CDR recovers clock and phase on one MCM lane, then drives simpler samplers on other lanes to cut power and area.

When an external main clock drops out, detection and automatic bypass switching keep the audio processor stable and able to recover gracefully.

Phase detection and pulse suppression align independent LO divider phases at startup, reducing MIMO waveform distortion and calibration burden.

A heat-deformable membrane seals the optical cavity after controlled alkali evaporation, avoiding dispenser size and buffer gas mismatch.

Alternating phase interpolators and rearranged control signals prevent destructive interference and keep clock recovery running.

Asynchronous sampler clocks are digitally aligned from sampled calibration patterns to correct PHY phase skew and reduce noise-driven data distortion.

Clock-controlled current paths balance pull-up and pull-down timing in a level shifter, reducing waveform and duty ratio distortion.

A divided-and-mixed PLL chirp monitor tracks radar sweep linearity in real time to catch malformed pulses before they degrade reliability.

Successive intermediate clock divisions let a voltage controller follow load changes and prevent IC supply overshoot or undershoot.

Adjusting base time units and depth coefficients lets a spread spectrum clock widen frequency range, suppress EMI, and preserve clock quality.

A PLL enters holdover mode and adjusts a multi-mode divider to align feedback with a new reference clock for hitless switching.

Discrete switched-capacitor charge pulses sustain a resonator with lower power use and more stable operation across system voltages.

Weighted cross-correlation of interior spectral components improves receiver clock phase detection under jitter, dispersion, and ASE noise.

Sampling-based detection compensates circuit offset and mismatch to correct duty cycle and quadrature phase distortion in high-speed clocks.

A switched-capacitor RCO uses LPF-integrator feedback and digital calibration to reach higher clock frequency with lower power and smaller IC area.

An electrochemical back electrode actively sources and sinks alkali atoms for fast, stable vapor density control in miniature vapor cells.

Resetting the PLL feedback divider absorbs large clock phase offsets, enabling hitless source switching with lower transients and faster recovery.

Periodic clamping and restart of RF oscillation boosts weak signals with high selectivity and low noise, without frequency conversion.

A laser-trapped nanoparticle in vacuum boosts accelerometer sensitivity in compact devices by measuring displacement and oscillation frequency.

A PLL control voltage drives a regulator to adapt supply voltage, cutting timing variation from process, voltage, and temperature shifts.

A tunable-delay converter aligns complementary LVDS outputs from single-ended logic, cutting jitter and improving PVT tolerance.

A reference delay circuit and state machine calibrate TDC phase alignment to improve resolution and linearity under process, voltage, and temperature variation.

Scaling loop filter gain from measured DCO behavior cuts PVT-driven frequency error and reduces PLL lock time to under 30 cycles.

A digital PLL cuts processor frequency quickly by switching off DCO devices and lowering filter gain to ride through voltage droops.

Adaptive control-signal correction suppresses PA-induced oscillator drift, keeps PLL lock, and supports single-chip RF integration.

A DLL and R/W QED circuit align memory commands with the internal clock across 1T, 2T, and 3T modes to cut timing errors and power use.

A PLL-slaved auxiliary oscillator removes quartz micro-hops while preserving precise frequency reference and GNSS signal continuity.

Periodic injection location or phase changes let an injection-locked oscillator deliver fractional clock multiplication with switching in 10 ns or less.

Dual DLLs and a comparator array stabilize vernier delay elements against process, temperature, and voltage variation for accurate time-to-digital conversion.

Nonvolatile precursors release target gas inside a sealed cavity, avoiding costly flow control while preserving low pressure and spectral stability.

Selective delay-element switching extends phase-shift range while cutting noise and power loss across broad input frequencies.

An analog proportional path and digital integral path cut TDC precision demands, reducing phase noise and process variation sensitivity.

A digital phase detector and delay element filter residual PLL error in steady state, cutting jitter while preserving lock acquisition.

Shifting ODT information before the cloned DLL delay line lets memory circuits block unnecessary clocking and cut ODT power use.

Dual clock references, digital filtering, and an NCO cut output jitter while preserving frequency accuracy with minimal external components.

Dynamic clock scaling cuts frequency during voltage droop and restores it stepwise, improving microprocessor stability, energy use, and speed.

A staggered multi-oscillator clock multiplier cuts re-lock latency during input frequency changes while preserving wide frequency agility.

A multi-stage TDC detects phase error at several resolutions, cutting digital locking loop lock time without a wide, power-hungry converter.

A unified clock enable path helps this clock circuit resist PVT variation, avoid race conditions, and support wider operating voltages.

Inverse-step injection signals in an injection-locked ring average INL errors, reducing I-Q clock skew and jitter.

Stopping signal regeneration when outputs go high cuts crowbar current and capacitor loading while preserving time-difference gain.

Relative delays on both clock paths with DEM-controlled delay cells reduce spurious tones, noise sensitivity, and phase error.

Predistortion and charge sharing in two switched-capacitor networks suppress PLL quantization noise and spurs while supporting wider bandwidth.

Temperature-based DDS correction compensates atomic oscillator drift, preserving long-term timing precision despite frequency-temperature nonlinearity.

Monitored clock frequency is corrected in small control steps during operation, keeping drift within range without taking the system offline.

Real-time feedback adjusts clock phase from converter phase and temperature data to maintain synchronization and extend calibration intervals.

Dual-edge counters and stored oscillator states let a ring-oscillator TDC resolve asynchronous count uncertainty for precise short-interval timing.

Open-loop PLL calibration uses TDC output distributions to correct nonlinearity, cutting control-signal noise and improving DCO output quality.

A phase noise detector drives adjustable clock delay to cut jitter and improve spectral purity without the usual bandwidth and power trade-offs.

A memory DLL switches between divided and reference clocks to cut power use and locking time while maintaining output timing synchronization.

Delayed opposite-polarity charge-pump currents reshape CDR loop response to cut VCO jitter, reduce latency, and support higher data rates.

A band-pass filter and comparator detect regulator oscillations from missing stability components without periodic shutdowns, preventing load damage.

Using both rising and falling clock edges with a sampled loop filter, this PLL suppresses duty cycle errors, phase noise, and sidebands.

Adjustable clock recovery bandwidth filters adjacent channel leakage while preserving phase noise suppression in dense optical links.

Combining TDM with pulse-amplitude modulation cuts time slots and boosts eddy current array inspection speed without losing signal quality.

A dual-PLL frequency tracker stores offset at switchover to avoid clock phase glitches and frequency drift while locking to a new reference.

A sampling time-to-digital converter gives an MDLL sub-picosecond phase correction to cut spurs, noise, and loop power.

Frequency-dependent gain compensates DCO variation during FMCW ramps, keeping ADPLL bandwidth stable and limiting phase noise.

Selectable DDS clock frequencies and stored divider settings enable fast frequency switching while keeping spurious components out of the target band.

A single crystal, PLL, and integer divider stabilize Tx/Rx delta frequency in pulsed radar level gauges for more reliable tank level measurement.

Rate detection and receiver reconfiguration let transceivers handle arbitrary clock rates without costly wide-range PLLs.

A transistor-based duty cycle sensor and corrector holds clock signals near 50% duty cycle while cutting power use and clock-path bandwidth impact.

A charge manager splits and diverts pump charge so a PLL can use a smaller filter capacitor without adding jitter, noise, or cost.

Periodic subsampling phase detection removes PLL frequency dividers, cutting motion detector power while preserving Doppler sensing accuracy.

Switchable div2/div3 circuitry closes PLL frequency gaps while reducing power and overhead and preserving 50% duty cycle.

Parallel digital and analog tuning paths let a ring PLL cut phase jitter while avoiding the size and cost of analog or LC tank designs.

A feedback capacitor and logic check let a high-voltage level shifter detect false output switching, restore correct states, and cut static consumption.

Selectable TDC delays and sensor-based re-timing keep DCO and reference clocks aligned, reducing metastability, spurs, and phase noise.

Pre-trained oscillator models predict correction signals during reference loss, keeping holdover timing accurate without manual reset.

Variable accuracy codes and delta-sigma modulation help a frequency synthesizer correct clock drift and jitter while balancing power use.

A shared counter-based divider generates integer and fractional clocks with 50/50 duty cycle while cutting power and divider count.

Bias-controlled differential pairs let one RF extender switch multiplied or divided signals with lower power, less interference, and easier integration.

Controllable frequency scaling lets CDR circuitry adapt to serial protocols from 622 Mbps to 12.5 Gbps without reprogramming or reset.

Phase-error statistics guide PLL bandwidth changes to balance fast lock acquisition with accurate phase tracking under varying input signals.

Parallel digital and analog tuning paths let a ring PLL reduce quantization-driven phase jitter without the size and cost of LC tank designs.

A high-current startup followed by synchronized pulse injection lets a crystal oscillator start reliably and sustain oscillation at ultra-low power.

Software-based phase synthesis and frame recovery improve clock stability, phase accuracy, and low-jitter synchronization with low-cost oscillators.

Multiple VCOs and a dynamic divider widen LO tuning range while holding phase noise low for flexible microwave backhaul frequency generation.

A phase-frequency detector with a crystal oscillator and programmable divider verifies unknown input frequencies with low component count.

Reverse circular polarization offsets magnetic quantum number deviation, boosting EIT signal strength and atomic oscillator frequency stability.

A temperature- or frequency-dependent phase shift offsets coupled interference around the PLL, reducing phase error and stabilizing transmission.

Multiple clock domains are coordinated through a clock management block that aligns clocks and control signals for predictable FPGA timing.

A synchronized carrier generator enables RF data transfer over one differential line, cutting interconnect count while preserving timing and data integrity.

A calibration-then-frequency-locking scheme keeps NFC active load modulation synchronized during long transmissions, reducing phase shift and signal loss.

A fractional PLL shifts chip clock frequency to move digital spurs out of analog rejection bands with finer control and less processing complexity.

Pre-charge, sensing, and reset timing help a duty cycle corrector cut develop time and limit charge pump ripple during clock correction.

Interpolated dual-point sampling improves fractional-N SS-PLL spectral purity while reducing phase noise and spurious tones without finer DTC resolution.

Pulse-width detection guides DLL delay step selection, cutting clock cycles for phase lock while avoiding internal clock over-adjustment.

Using thin-oxide VCO transistors, thick-oxide filter transistors, and a buffer circuit, this PLL reduces gate-leakage jitter and preserves oscillation range.

An asymmetric divider balances the VCO load to halve frequency while cutting power use, phase noise, and quadrature error in RF signal generation.

A digital filter suppresses sigma-delta quantization and foldback noise in a wideband fractional-N synthesizer while preserving bandwidth.

A phase-locked variable clock tracks tunable RF frequency to improve impedance matching control and protect substrate processing chambers.

Idle PLL switching connects a second VCO in parallel to cut phase noise and boost oscillation strength in MIMO synthesizers.

Varying the receive time-stamp clock rate turns systematic packet timing errors into filterable noise, improving network synchronization accuracy.

An overflow counter and LUT calibrate two-point PLL VCO gain in open loop, cutting chip area and power while limiting PVT-driven distortion.

Non-uniform transconductance placement among switched impedances suppresses parasitic resonances and keeps the selected resonant mode dominant.

Analog and digital delay control expands DLL timing range, cuts jitter, and improves phase and frequency locking in high-speed links.

Periodic zero-charge sampling in a PLL loop filter cuts noise and reference spurs while preserving stable fractional-N clock generation.

A capacitor between setdrn and resdrn lines equalizes potential fluctuations to prevent dV/dt noise logic inversion in level-shift latches.

Dynamic delay selection and bit-rate measurement keep the recovered clock aligned during long identical digits, improving burst-mode data recovery.

Mixed delay elements and output selection make delay steps more uniform, cutting TDC quantization error and improving timestamp resolution.

Intermittent phase control uses comparator feedback to keep clock alignment accurate while lowering current consumption.

Feed-forward digital clock recovery corrects timing phase and frequency offset to improve jitter tolerance in high-speed coherent receivers.

A DPLL uses Type-1 behavior during acquisition and phase offsets to achieve fast settling, no frequency overshoot, and zero steady-state phase error.

A stable low-frequency reference corrects RF synthesizer phase hits and microphonics, enabling high-order QAM and MIMO backhaul links.

A pre-driver and main driver create higher-level pull-up and pull-down signals to keep narrow-swing transmission reliable while limiting power use.

A digital DLL with phase interpolation enables monotonic clock delay steps, fast lock, and low-power edge placement in forwarded-clock I/O.

Reservoir capacitors placed beside selected delay cells stabilize high-frequency clock voltage, cutting noise and power use in synchronization.

Variable negative resistance equalization helps a data sampler offset inter-symbol interference and channel attenuation across sampling and latching.

A digital delay line and injection locking shrink fractional-N clock area while suppressing jitter and noise in deep sub-micron ICs.

Dynamic CMOS inverter paths let a frequency divider switch modes to sustain high-speed operation while cutting power use.

A divided period signal and counting unit detect internal clock delay precisely, enabling compensation for synchronized data output.

A digital PLL switches between tracking-filter estimates and threshold-based jerk correction to cut dynamic errors and noise in phase and frequency tracking.

An oxide semiconductor transistor and capacitive coupling cut standby leakage in a low-voltage level shifter while preserving fast response.

Parallel power storage stages with different capacities and digital switches generate programmable analog current without supply-voltage dependence.

Aggregated lane error signals drive a shared recovered clock that compensates correlated offsets and jitter for higher multi-lane data rates.

A global DLL initializes local channel loops to cut locking time, power use, and circuit area in multi-channel clock generation.

Initialization-mode delay measurement lets a DLL lock faster and match internal and external clocks with less circuitry and power.

Sigma-delta noise shaping refines fractional feedback division in a fractional-N PLL to cut jitter without reducing bandwidth or slowing lock time.

An on-chip oscillator, digital low pass filter, and fractional divider remove clock jitter without an external crystal, cutting area and power.

Dynamic PLL bandwidth control uses phase-error lookup coefficients to track HAMR mode-hopping jumps while limiting normal read jitter.

One control die combines RFFE serial and GPIO modes for power amplifiers, reducing interface count, die area, and power use.

Interleaved clock frequency steps spread emissions across a span to cut radiated EMI and improve quasi-peak compliance without extra hardware.

Programmable delays at clock leaf nodes generate multiple phases with lower jitter, skew, power use, and routing overhead in programmable ICs.

A low-drift time base, counter, and digital integrator trim an IC clock oscillator to hold precise frequency over temperature and voltage.

Trimmed comparator feedback adjusts oscillator on and off times to hold frequency accuracy despite process, voltage, and temperature variation.

Controlled current steps from Gilbert cells linearize clock phase shifts, limiting skew and improving timing accuracy across clock domains.

A switched-capacitor feedback loop stabilizes oscillator frequency against noise and PVT variation without adding a voltage regulator.

Oscillation detection checks a higher-frequency clock before switchover, preventing metastability while preserving low-power wake-up speed.

Combining current coding and size coding improves phase interpolator linearity, reducing jitter and phase error in clock recovery.

A DLL switches from fine to coarse delay lines during ODT operation, cutting power use while preserving precise read-clock phase control.

A same-type reference circuit tracks process corners and switches current sources to cut VCO power use without sacrificing stable operation.

A single fixed-frequency oscillator and wide IF-ADC bandwidth let multiple tuners run concurrently with less crosstalk, power, and chip area.

A switched-capacitor resistive divider stabilizes FLL clock frequency across PVT changes while enabling spread spectrum EMI reduction.

Dynamic primary clock switching lets multi-processor systems reconfigure clock generation without errors, cutting power dissipation while keeping synchronization.

Shifted-signal feedback reconfigures the level shifter on each transition to cut latency, jitter, and duty-cycle distortion.

A divisor-controlled frequency divider lets the phase interpolator stay at a fixed frequency, extending CDR range without sacrificing linearity.

Using active mode signals from selected divider stages, this cascaded divider minimizes duty-cycle variation, jitter, and phase-noise.

Dynamic gain control with AFC and process compensation keeps clock recovery stable and minimizes jitter under PVT variation.

Adaptive delay and gain matching in two-point DPLL modulation reduces path mismatch, enabling wideband signals with lower EVM.

Multiple sampling points and dynamic counter selection improve circuit delay tracking accuracy without long averaging periods.

Dynamic reference voltage and flag-driven calibration help semiconductor buffers verify valid windows while lowering power use and preserving data speed.

Clipped pulse energy is fed back to the resonant oscillator input, reducing Zener-related power loss while keeping pulse amplitude constant.

A modified capacitive divider bank compensates parasitic capacitance to keep VCO frequency steps uniform and tuning linear.

Separating core-voltage detection from I/O disable outputs lets stacked drivers enter HIGH-Z during power-up and power-down, limiting crowbar current.

A self-calibrating digital delay chain compensates PVT spread to cut skew and jitter across wide-frequency IC synchronization.

Continuous slew-rate band switching lets a low-KVCO PLL sweep widely while maintaining lock and minimizing jitter.

Using dual TAF-DPS clocks and Vernier phase detection, this case improves absolute TOF resolution without delay-line sensitivity to PVT variation.

A flywheel oscillator, backup holdover oscillator, and DAC control improve clock stability when the external reference signal is unavailable.

A detector, loop filter, and controller split coarse and fine tuning to speed frequency locking while avoiding clipping across wide bands.

Multiple relatively prime component codes and correlation feedback shorten delay measurement and stabilize synchronization in low C/N.

Combining coarse and fine tune paths speeds PLL locking while a voltage divider and elliptical filter limit phase noise and fractional spurs.

A mock delay and buffer path aligns data clocks with command propagation delay, cutting sync circuit power and area while preserving timing.

A leaf-detected reference event is fed back to the root so a divided clock can be pattern-selected to match the external clock at remote nodes.

A level-shifted VCO buffer uses an inverter and feedback NMOS stage to cut static power dissipation and duty cycle distortion.

A control circuit temporarily raises LC tank common-mode voltage to boost VCO start-up gain under low supply and threshold limits.

A feed-forward network splits and filters PLL control-signal components to cut reference spurs and output noise without hurting lock stability.

A variable update interval helps a DLL lock faster under high-frequency clocks while reducing overshoot and control jitter.

Laser-off spectroscopy with fast relocking cuts AC Stark clock bias and drift in micro primary frequency standards.

A compensation circuit counters power-amplifier pulling in a PLL VCO, reducing spectrum deviation and stabilizing RF transmission.

Voltage-controlled delay circuits multiply an input clock to higher internal frequencies while cutting power use, phase error, and test cost.

Phase-shifted clock signals spread digital current draw across each cycle, reducing supply transients, RF interference, and timing risk.

Random dithering at the TDC input turns periodic quantization noise into white noise, improving all-digital PLL phase noise and control accuracy.

Passive or active bias circuitry lowers VCO gain while preserving wide frequency range, improving stability and noise performance.

Discrete phase correction offsets PFD error in a PLL, reducing jitter in gapped signals without sacrificing bandwidth or sync speed.

Temporarily stopping and restarting the PLL frequency divider cuts lock time and aligns multiple converted signals to a common reference.

A mask circuit ignores known deterministic jitter in PLL phase error signals, cutting timing errors without adding random jitter.

Bidirectional frequency margining lets a packaged MEMS oscillator suppress low-frequency spurs with 0.4 ppm tuning and no reboot.

A bias-controlled feedback pull-up keeps level shifting reliable across PVT corners while reducing delay, skew, and current consumption.

Complementary biasing with a shunt path and insulated CMOS substrate reduces RF switch insertion loss, harmonics, and distortion.

A single mixer-divider frequency chain generates MB-OFDM band-group signals, reducing separate generator count while preserving flexible allocation.

Variable magnetization enables frequency-tunable oscillation, while differential amplification boosts gain and signal quality in high-frequency bands.

On-chip fractional PLL clocking replaces external VCXO circuits, preserving frequency accuracy while cutting board space and power in OTN transponders.

A simplified CDR phase detector uses four AND gates and adaptive phase selection to cut locking jitter without sacrificing high-speed operation.

A DLL with multiplexers and delay cells replaces CML summers to generate phase-shifted clocks with lower power, less area, and full output swing.

A lower-frequency feedback clock path shifts duty-cycle correction out of the forward path to cut delay, gate count, and power use.

Skewed clock buffering and separate pull-up/pull-down paths prevent fighting currents, cutting power loss and widening mixer frequency range.