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| Number | Title | Issue Date |
| 8188801 | Delay circuit for low power ring oscillator Disclosed herein is a delay circuit for a low power ring oscillator. The delay circuit includes: a pair of N type transistors that receive first differential input signals Vin1+ and Vin1−; a pair of P type transistors that receive second differential... | 05/29/2012 |
| 7859355 | Regulated capacitive loading and gain control of a crystal oscillator during startup and steady state operation An oscillator circuit and system are provided having a peak detector that can determine a peak voltage value from the oscillator. The peak voltage value can then be compared against a predetermined voltage value by a controller coupled to the peak detector. The comp... | 12/28/2010 |
| 7710212 | Crystal oscillator with variable-gain and variable-output-impedance inverter system A crystal oscillator with variable gain and variable output impedance inverter system includes an inverter, a variable impedance feedback circuit, connected between the output and input of the inverter, a crystal oscillator system, having a crystal with first and se... | 05/04/2010 |
| 7659788 | Amplitude regulating circuit An amplitude regulating circuit for an oscillator with an input for a supply signal having an electrical quantity depending on an amplitude of an oscillation of the oscillator has a supply circuit with a control input for a first control signal and a supply output f... | 02/09/2010 |
| 7567140 | Voltage controlled oscillator having a bandwidth adjusted amplitude control loop An apparatus comprising a first circuit and a second circuit. The first circuit may be configured to generate an output signal oscillating at a frequency in response to a first control signal and a second control signal. The second circuit may be configured to gener... | 07/28/2009 |
| 7528673 | Oscillator circuit and semiconductor device having oscillator circuit An oscillator circuit having a closed loop connection, including: an oscillator for generating an output signal oscillating at a frequency corresponding to a control signal; a frequency/voltage converter for generating a detection signal having a voltage correspondi... | 05/05/2009 |
| 7414486 | Device and method for power calibration of an oscillator It is therefore the object of the present invention to disclose a device for power calibration of an oscillator in the high-frequency range, which has a reduced number of components and/or has less-expensive components. A method for power calibration of an oscillato... | 08/19/2008 |
| 7391275 | Circuits and methods for a ring oscillator with adjustable delay and/or resonator tank stage Circuits and methods for generating an oscillator output. The circuit generally includes a ring oscillator, with a series of inverters connected in series and an LC resonator tank (or a variable resistance) coupled to the input and output of the inverter series. The... | 06/24/2008 |
| 7372342 | Oscillator A high-performance crystal oscillator providing effective bias resistors with low power consumption and minimal substrate surface area. In various embodiments of the invention, a switched-capacitor resistor is operably coupled to circuit components, such as an oscil... | 05/13/2008 |
| 7369009 | Oscillator device for frequency modulation The present invention pertains to an oscillator arrangement for carrying out a frequency modulation process, wherein an oscillator (1) with automatic amplitude control (5, 6, 7) is provided. The shift keying is not realized with reconnectable capacitan... | 05/06/2008 |
| 7365613 | Method of determining resonant frequency A method for operating a torsion oscillator at its resonant frequency. The method performs an open-loop frequency sweep starting with nominal operation parameters saved from the factory or from a previous operation of the torsion oscillator. The sweep determines an ... | 04/29/2008 |
| 7348861 | Method and apparatus for a crystal oscillator to achieve fast start-up time, low power and frequency calibration One embodiment of the present invention includes a frequency generation circuit including a control module, an oscillator circuit coupled to the control module, the oscillator circuit having a start-up time defined by the time required to reach a desired frequency. ... | 03/25/2008 |
| 7336134 | Digitally controlled oscillator A tunable oscillator suitable for use in a frequency synthesizer of a transceiver is controlled by varying one or more parameters associated with the oscillator. In particular, a digital control signal affects one or more of the capacitances of the oscillator, the b... | 02/26/2008 |
| 7332979 | Low noise reference oscillator with fast start-up A frequency source having a fast start-up time and low noise in steady state is presented. The frequency source includes an oscillator and a hybrid automatic gain control (AGC) loop that switches between an analog AGC loop at oscillator start up and a digital AGC lo... | 02/19/2008 |
| 7330081 | Digitally controlled oscillator and associated method A digitally controlled oscillator circuit is provided that comprises a ring oscillator including multiple inverters; multiple digitally controlled capacitors (DCCs), each coupled to apply a digitally controllable amount of capacitance to an output of a different one... | 02/12/2008 |
| 7327201 | Semiconductor integrated circuit device and wireless communication device A semiconductor integrated circuit device having a voltage controlled oscillation circuit that is capable of sufficient oscillation performance and a wireless communication device having the semiconductor integrated circuit device are disclosed. A difference between... | 02/05/2008 |
| 7321269 | High frequency ring oscillator with feed-forward paths An inverting circuit comprises a first inverter in a main path having a first input and a common ouput. A second inverter receives the first input and is coupled with a first voltage controlled pass gate to the common output. A third inverter couples a second input ... | 01/22/2008 |
| 7310026 | Semiconductor integrated circuit with function to detect state of stable oscillation A semiconductor integrated circuit includes a reference-voltage circuit configured to produce a predetermined reference voltage at an output node thereof, a comparator, coupled to a node to which an oscillating signal is supplied and to the output node of the refere... | 12/18/2007 |
| 7301412 | Variable capacity circuit and control method of variable capacity circuit To present a variable capacity circuit and a control method of variable capacity capable of extending a variable capacity width of a variable capacity element to a maximum extent without increasing an element area of the variable capacity element or varying the leve... | 11/27/2007 |
| 7295584 | System and method for generating multi-wavelength laser source using highly nonlinear fiber A number of embodiments provide multi-Wavelength Laser Source (MWLS) designs based on Super Continuum (SC) generation using Highly Non-Linear optical Fiber (HNLF). Advantageously, in some embodiments this technology only needs a single wavelength locking mechanism t... | 11/13/2007 |
| 7292114 | Low-noise high-stability crystal oscillator Circuits, methods, and apparatus that provide low-noise, high-stability crystal oscillators having controlled-amplitude differential output signals and DC level control. A crystal oscillator circuit has two feedback loops, one for setting the DC level of its signals... | 11/06/2007 |
| 7292115 | Method to differentially control LC voltage-controlled oscillators A method of differentially controlling an LC voltage controlled oscillator (VCO) includes providing an LC-VCO comprising at least one inductor, measuring an inductor common voltage (CMV) output at a point along the at least one inductor, utilizing the measured induc... | 11/06/2007 |
| 7289003 | Method and apparatus for amplitude control using dynamic biasing in a voltage controlled oscillator A method, circuit, and/or system for controlling an amplitude and/or limiting or reducing the energy consumed by an LC voltage controlled oscillator (LCVCO). In one embodiment, an oscillator can include: (i) a bias circuit that can provide first and second bias sign... | 10/30/2007 |
| 7286023 | Crystal oscillation circuit with frequency regulation It is an object of the invention to obtain a stable operation with a low phase noise. Moreover, it is another object to obtain an oscillating output which does not cause the delay of a starting time. According to the invention, it is possible to implement a crystal ... | 10/23/2007 |
| 7271674 | Automatic level control for radio frequency amplifiers The disclosure relates to an automatic level control technique for RF amplifiers in a communication system, such as a wireless communication system. The invention provides an automatic level control technique to compensate for variations in the gain of an RF amplifi... | 09/18/2007 |
| 7271676 | Method and/or apparatus for implementing a voltage controlled ring oscillator having a multi-peak detected amplitude control loop An apparatus comprising a first circuit and a second circuit. The first circuit may be configured to generate an output signal oscillating at a first frequency in response to (i) a first control signal, and (ii) a second control signal. The second circuit may be con... | 09/18/2007 |
| 7271675 | Automatic gain control circuit and method and super-regenerative RF receiver An automatic gain control (AGC) circuit is applied to control a margin voltage of an oscillator. The margin voltage is the voltage difference between a high-level output and a low-level output of the oscillator. The AGC circuit of the present invention includes a co... | 09/18/2007 |
| 7265640 | Circuit approach for common mode control in high-frequency clocks An example embodiment is directed to shifting the common mode voltage of an analog oscillation stage toward a center line between the upper and lower power-supply rails of a first digital circuit. The first digital circuit has a digital input port adapted to respond... | 09/04/2007 |
| 7265527 | Direct current multiplier A self-oscillating DCM is disclosed comprising two inductors that charge and discharge 180 degrees out of phase such that the charging inductor is conducting an upward ramping current and the discharging inductor is conducting a downward ramping current. A load rece... | 09/04/2007 |
| 7263340 | PLL circuit having a multi-band oscillator and compensating oscillation frequency A semiconductor integrated circuit device for communication is provided with a PLL circuit or the like formed therein, the PLL circuit which is capable of realizing the compensation of fluctuation due to temperature change, the inhibition of increase in the chip are... | 08/28/2007 |
| 7262671 | Amplitude level control circuit Amplitude level control circuit for an oscillator comprising first means arranged to generate a first current for driving the oscillator; and second means arranged to generate a second current such that in direct current conditions the second current is arranged to ... | 08/28/2007 |
| 7256629 | Phase-locked loops A phase-locked loop (PLL) is disclosed. One embodiment, among others, includes a PLL that provides a control signal and a square root module configured to receive state information, the state information corresponding to tuning information, the square root module fu... | 08/14/2007 |
| 7238181 | High-frequency surgery generator A high-frequency generator for high-frequency surgery comprises a power generator for supplying high frequency energy at a base frequency. A standardizing factor is determined, with which an output variable from the power generator must be scaled in order to attain ... | 07/03/2007 |
| 7236741 | Methods and apparatus for tuning in an inductive system Electronic circuitry supports utilization of a series of pulses of varying width to tune a transducer (e.g., a coil that produces or receives a magnetic field) for transmitting or receiving. For example, a control voltage generator generates a sequence of digital pu... | 06/26/2007 |
| 7236063 | Broadband modulation PLL, and modulation factor adjustment method thereof A problem of the present invention is to provide a wide band modulation PLL having good modulation accuracy at low cost. With respect to a PLL having a VCO (21), a frequency divider (22), a phase comparator (23), a charge pump (24) and a ... | 06/26/2007 |
| 7227426 | Using hysteresis to generate a low power clock A real time clock that operates an oscillator within a predetermined range by employing a constant current source. The remaining real time clock logic can be operated at a voltage that is relative to the constant current. Power consumption of the oscillator can be c... | 06/05/2007 |
| 7218170 | Multi-pole current mirror filter A current mirror with selectable filter poles provides a selected low pass filtering function to a DC bias signal generated by the current mirror. Coupled between a first MOSFET and second MOSFET of the current mirror, a low pass filter with selectable filter poles ... | 05/15/2007 |
| 7203556 | Device for monitoring medical equipment A medical instrument, in particular a generator for high-frequency surgery, comprises setting elements for presetting functions, and also functional elements for performing functions according to the settings. A controller interrogates the setting elements and contr... | 04/10/2007 |
| 7196592 | VCO circuit with broad tuning range and amplitude control A voltage-controlled oscillator circuit. A pair of inductors are coupled to a first power source. A pair of capacitors respectively coupled between a variable resistor and the pair of inductors in serial. A pair of first switches respectively coupled between the pai... | 03/27/2007 |
| 7187245 | Amplitude control for crystal oscillator Circuits and methods for controlling the amplitude of oscillation of a crystal. In one example, a circuit may include a peak detector; a first voltage-to-current converter; a first current-to-voltage converter coupled with the first voltage-to-current converter; a s... | 03/06/2007 |
