| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 327102000 | Converting input frequency to output current or voltage | 11 |
| 20090134917 | VOLTAGE DIVIDER HAVING VARIED OUTPUT LEVELS DEPENDING ON FREQUENCY AND PLL INCLUDING THE SAME - A voltage divider for dividing an input voltage includes a fixed resistor, a variable resistor, an input node and an output node. The fixed resistor has a fixed resistance value independent of an operating frequency, and includes at least one resistance device. The variable resistor has a variable resistance value that varies corresponding to a variation of the operating frequency. The input node receives the input voltage, and the output node outputs an output voltage, which includes the input voltage divided based on the fixed resistance value and the variable resistance value. | 05-28-2009 |
| 20100171530 | TIME-TO-AMPLITUDE CONVERTER COMPONENT - A time-to-amplitude component having an integrated designed configured to measure a time difference between a start signal and a stop signal includes a first time-to-amplitude converter having a delay chain, a resistor network, a capacitor configured to be chargeable via the resistor network, and a respective driver. The component further includes a control device and a stabilizing device including a control circuit for generating a regulated control voltage. The first time-to-amplitude converter is configured so that the delay elements of the first time-to-amplitude converter are configured to be controlled by the regulated control voltage, a run signal is transmitted through the delay chain, and the capacitor is continuously charged via the resistor network, and the resistor network is electrically separated from the delay chain via the respective drivers so as to terminate a charging of the capacitor, and the analog voltage signal is measurable at an output of the capacitor. | 07-08-2010 |
| 20100219865 | FREQUENCY DETECTION APPARATUS AND METHOD - A frequency detection apparatus and method are provided. The frequency detection apparatus includes a frequency conversion circuit and an analog conversion circuit. The frequency conversion circuit receives an input clock, and generates an analog signal corresponding to a frequency of the input clock based on the frequency of the input clock. The analog conversion circuit is coupled to the frequency conversion circuit, receives the analog signal, and generates a discriminating signal corresponding to the frequency of the input clock based on the analog signal, where the discriminating signal represents a frequency interval of the input clock. | 09-02-2010 |
| 20110156760 | TEMPERATURE-STABLE OSCILLATOR CIRCUIT HAVING FREQUENCY-TO-CURRENT FEEDBACK - A signal generating circuit and method are disclosed that do not require a phase-locked-loop and a low frequency temperature-stable oscillator. The method may include generating an oscillating output signal responsive to a feedback signal, where the feedback signal controls a frequency of the oscillating output signal, generating a current output signal having a magnitude corresponding to the frequency of the oscillating output signal, and then comparing the current output signal to a reference signal to generate the feedback signal. The signal generating circuit may include an oscillator circuit responsive to a feedback signal and a frequency-to-current conversion circuit configured to generate a frequency dependent current signal that is compared to a reference current to generate an output signal corresponding to the frequency of the oscillating output signal. A feedback conversion circuit compares the output signal with a reference signal to generate the feedback signal to the oscillator circuit. | 06-30-2011 |
| 20110227611 | OSCILLATOR AND CONTROL METHOD THEREOF - An oscillator and the control method thereof. The oscillator includes an oscillation unit to receive a first current and to generate an oscillating signal according to the first current, a frequency-to-voltage converter to receive the oscillating signal and to generate a converted voltage according to a frequency of the oscillating signal, and a voltage-to-current converter to receive the converted voltage and to generate the first current according to the converted voltage, wherein the first current is modulated from a first value to a second value after the initiation of the oscillation unit. | 09-22-2011 |
| 20120001658 | MODULATION PROFILE GENERATOR AND SPREAD SPECTRUM CLOCK GENERATOR INCLUDING THE SAME - There is provided a modulation profile generator and spread spectrum clock generator including the modulation profile generator. The modulation profile generator includes an input signal generator that generates an input signal; a function calculator that outputs a function calculation result in the form of a square root graph by using the input signal as an input of a function; and a profile generator that generates a non-linear modulation profile based on the function calculation result. As a result, it is possible to effectively reduce electromagnetic interference. | 01-05-2012 |
| 20120074986 | SEMICONDUCTOR DEVICE - A high-accuracy clock signal is generated even when the settings of the clock frequency are changed or there is a variation in power supply, temperature, or the like. A frequency-voltage conversion circuit includes a switch portion including switches, electrostatic capacitive elements, and other switches. The electrostatic capacitive elements have different absolute capacitance values, and are provided so as to cover a frequency range intended by a designer. For example, based on 4-bit frequency adjustment control signals, the other switches select the electrostatic capacitive elements having the electrostatic capacitance values thereof each weighted with 2 to perform the switching of a frequency. | 03-29-2012 |
| 20120319738 | SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE - A frequency-voltage converting circuit | 12-20-2012 |
| 20140132308 | FAST LOCK ACQUISITION AND DETECTION CIRCUIT FOR PHASE-LOCKED LOOPS - A phase lock loop (PLL) circuit incorporates switched capacitive circuitry and feedback circuitry to reduce the time to achieve a lock condition. During a first mode, the frequency of a voltage controlled oscillator (VCO) is used to adjust the control voltage of the VCO to achieve a coarse lock condition. During a second mode, a reference frequency is used to control a charge pump to more precisely adjust the control voltage to achieve fine lock of the PLL. Because the VCO frequency is significantly higher than the reference frequency, the control voltage is varied at a greater rate during the first mode. In some embodiments, the time to achieve lock may be further reduced by initializing the VCO control voltage to a particular voltage so as to reduce the difference between the control voltage at start-up and the control voltage at the beginning of the first mode during coarse lock. | 05-15-2014 |
| 20140159776 | VOLTAGE AND TEMPERATURE COMPENSATED FREQUENCY CONVERTER - A voltage to frequency conversion system may be used in association with clock related applications such as a closed loop oscillator. The voltage to frequency conversion system includes independent current sources that are synchronously operated to generate substantially the same respective output currents under varying temperature and supply voltage conditions. One of the current sources is used to generate a reference voltage, and the other of the current sources is used to charge a capacitor in a predetermined ramp. The capacitor may be selectively charged and discharged based on a frequency of an input signal, and an average of the variable charge voltage of the capacitor may be compared to the reference voltage to generate an analog output signal indicative of frequency. | 06-12-2014 |
| 20140266317 | Capless Voltage Regulator Using Clock-Frequency Feed Forward Control - A voltage regulator for controlling an output device in accordance with embodiments includes an error amplifier; a controlled conductance output device; and a load predicting circuit; wherein an output of the error amplifier and an output of the load predicting circuit are summed to control the output device. | 09-18-2014 |
