Abstract:
The Anlinx™:LVLP Hybrid Analogic Field Programmable Array of Milinx™:Mixed Signal FPSC™ Field Programmable System Chip™ is constituted of Field Programmable Hybrid Array (FPHA and Frequency Programmable Xtaless Clock (FPXC) being for high-speed and high frequency System-Design-On-Chip(SDOC) embedded in a single chip of Field Programmable System Chip(FPSC™). The FPXC adopts the Self-Adaptive Process & Temperature Compensation Bandgap Reference Generator, the Gain-Boost Amplitude Control LC VCO and inverter type flash memory. The FPHA adopts the two-way flash switch and inverter type flash memory Look-Up-Table(LUT). The FPXC adopts the inverter type flash memory as the Non-Volatile Memory(NVM) to keep the setup data in the field frequency programming. The flash technology of FPHA and FPXC are compatible that the FPHA has the FPXC capability. The PLLess CDR(PLL free Clock Data Recovery) is based on the FPXC capability for the SerDes high frequency application. The PLLess CDR and pipeline ADC are for the analog front high frequency application. With the SDOC on FPHA, the Automobile Infotainment Center(MIC) is reduced to be Mobile Infotainment Center(MIC). The (1) Capacitorless Low Drop Voltage (Capless LDVR) (2) Inductor less Switch Mode Power Supply (Indless SMPS) (3) Resistorless Current Sensor (Resless CS), (4) Saw Filter Less Low Noise Amplifier(Sawless LNA), (5) Diode Less True Random Number Generator (Dioless TRNG), (6) Crystal Less Clock (Xtaless Clock), (7) PLL Less Clock and Data Recovery (PLLess CDR) and (8) Filmless Touching Screen (FLTS) constitutes the most advanced System Design On Chip (SDOC) on Field Programmable Hybrid Array (FPHA) for Mobile Infotainment Center (MIC).
Abstract:
An integrated circuit device comprises tuning signal circuitry for generating a tuning signal for calibrating a voltage controlled oscillator (VCO). The tuning signal circuitry is arranged to receive a target voltage signal that is representative of a target voltage across at least one passive element within a resonant tank circuit of a VCO that is being calibrated, generate a VCO simulation signal representative of an average voltage difference across at least one active component of the VCO that is being calibrated, and output a tuning signal based at least partly on the received target voltage signal and the generated VCO simulation signal.
Abstract:
A method and apparatus for compensating for temperature variation in a phase locked loop (PLL) includes receiving an error signal by a controller in which the error signal representative of an instantaneous frequency difference between a reference frequency signal and an output frequency signal of a voltage controlled oscillator of the PLL, and determining when a voltage of the error signal is outside of a predetermined voltage range. When the voltage is outside the predetermined voltage range, the method includes generating a new digital compensation signal based upon a previous digital compensation signal, and converting the new digital compensation signal to be an analog compensation signal. The method further includes filtering the analog compensation signal by a filter to produce a filtered analog compensation signal, and adjusting the output frequency of the voltage controlled oscillator in accordance with the filtered analog compensation signal.
Abstract:
In embodiments of the present disclosure, a method may include determining an ambient temperature of an oscillator. The method may also include estimating an approximate frequency of operation of the oscillator. The method may additional include determining a process-based compensation to be applied to a resonator of the oscillator based on the approximate frequency. The method may further include setting a capacitance of a variable capacitor coupled to the resonator in order to compensate for temperature-dependent and process-dependent frequency variation of the oscillator based on the ambient temperature and the process-based compensation.
Abstract:
A semiconductor device contrived to prevent a reference voltage and a reference current which are supplied to a high speed OCO from varying with a change in ambient temperature and/or a change in an external power supply voltage and to reduce the circuit area of a power supply module. The high speed OCO outputs a high speed clock whose magnitude is determined by the reference current and the reference voltage. A logic unit adjusts the values of the reference current and reference voltage, according to the reference voltage and reference current trimming codes related to detected ambient temperature and operating voltage.
Abstract:
A clock generation circuit is provided, having a bandgap reference circuit, a frequency controlled resistor, a comparison circuit and a voltage controlled oscillator. The bandgap reference circuit generates a first voltage. The frequency controlled resistor is coupled to a first node to provide a second voltage. The comparison circuit generates a first current according to a difference between the first voltage and the second voltage. The voltage controlled oscillator outputs first, second and third output clocks according to a third voltage on a second node, wherein the third voltage is generated according to the first current, and the second and third output clocks are fed back to the frequency controlled resistor such that the frequency controlled resistor converts the first current into the second voltage according to the second and third output clocks.
Abstract:
A precise, low-consumption low-frequency oscillator includes a low-consumption low-frequency oscillator, operating at a frequency FA, a temperature-compensated oscillator B used as frequency standard, operating at a frequency FB, and a circuit for supplying a stable frequency Fcorr.
Abstract:
An integrated circuit device includes at least one controllable oscillator including a first control port and at least one further control port, at least one frequency control module including an output arranged to provide a frequency control signal. The at least one controllable oscillator further includes at least one compensation module including an output arranged to provide at least one compensation signal. The at least one compensation module includes an integrator component arranged to receive at an input thereof a signal that is representative of a difference between the indication of the frequency control signal and a reference signal, and to output an integrated difference signal. The at least one compensation module is arranged to generate the at least one compensation signal based at least partly on the integrated difference signal output by the integrator component.
Abstract:
A phase for an analog-to-digital converter sampling clock is determined. The analog-to-digital converter samples a video signal to generate pixel values. Differences of successive pixel values are compared to a threshold. The number of times the threshold is exceeded is counted for multiple phase values to create a phase profile. The threshold may be dynamic.
Abstract:
A voltage control oscillator implemented in an integrated circuit includes a supply circuit and an oscillating circuit. The supply circuit, implemented with an input/output (I/O) interface element, receives an I/O reference voltage signal and provides a power signal accordingly. The oscillating circuit, implemented with a core circuit element, provides an oscillation signal in response to the power signal. A swing of the oscillation signal is determined according to a level of an I/O reference voltage signal.