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6188291 Injection locked multi-phase signal generator  
Two or more equal amplitude periodic output signals which are mutually shifted in phase by an integer fraction of 360 degrees, such as 90°, are generated by injection locking a ring type...
6188692 Integrated user network interface device for interfacing between a sonet network and an ATM network  
A user network interface device for interfacing between synchronous optical network (SONET)/synchronous digital hierarchy (SDH) which is characterized by a continuous stream of frames of data and...
6184754 Voltage-controlled oscillator circuit and voltage-controlled oscillating method  
A VCO has n inverters connected to each other in a ring, wherein the inverters have a depletion-mode FET. A selector control circuit produces a select signal based upon a threshold voltage of a...
6181213 Phase-locked loop having a multi-phase voltage controlled oscillator  
The present invention provides a phase-locked loop having a multi-phase voltage controlled oscillator. The phase-locked loop comprises a divided-by-N counter, a divided-by-M counter, a phase...
6177846 Ring oscillator type voltage controlled oscillator  
A voltage controlled oscillator includes plural cascade-connected unit circuits supplied with selection signals corresponding to an oscillation frequency. Each unit circuit includes a voltage...
6175282 Method for calibrating a VCO characteristic and automatically calibrated PLL having a VCO  
A method is disclosed for calibrating the oscillation frequency versus control voltage characteristic of a voltage controlled oscillator (VCO). The method includes establishing an oscillation...
6166607 Semiconductor test structure formed in cutting path of semiconductor water  
A semiconductor test structure includes a semiconductor test device having at least one group of test cells that are connected in series and looped back so as to form an oscillator. Each test cell...
6163226 Current-controlled p-channel transistor-based ring oscillator  
A current-controlled oscillator (ICO) circuit including an all p-channel transistor based ring oscillator, a first current mirroring stage, and a second current mirroring stage. The all p-channel...
6163224 PLL circuit and method of controlling the same  
A PLL circuit detects oscillation halt of a voltage control oscillator, generates an oscillation control signal for automatically oscillating the voltage control oscillator based upon the detected...
6163225 Method and apparatus for achieving low standby power using a positive temperature correlated clock frequency  
A method for generating a positive temperature correlated clock frequency is described. The method comprises conducting current through a resistor to charge a capacitor. When the capacitor is...
6157230 Method for realizing an improved radio frequency detector for use in a radio frequency identification device, frequency lock loop, timing oscillator, method of constructing a frequency lock loop and method of operating an integrated circuit  
An integrated circuit comprising a receiver, a transmitter, and a frequency lock loop configured to supply clock signals to the receiver and transmitter, the frequency lock loop including a current...
6157267 Variable frequency multiple loop ring oscillator  
A variable frequency oscillator including an oscillation unit including a ring oscillator having multiple loops, and a frequency control unit controlling switching among the multiple loops in...
6157266 Delay elements arranged for a signal controlled oscillator  
A ring-type signal controlled oscillator comprising a series of active delay elements, each including a respective differential pair of transistors. The inputs and outputs of the differential pair...
6154100 Ring oscillator and delay circuit using low threshold voltage type MOSFETS  
Of the MOSFETs used to implement an oscillator circuit or a delay circuit in a semiconductor device, minimally the MOSFETs P12 (N12) used in a part of the circuit that affects the oscillation...
6154098 Gain-adjustable voltage-controlled oscillator  
The present invention includes a voltage control circuit having at least one voltage-controlled oscillator and at least one voltage controller connected to the voltage controlled oscillator. The...
6154099 Ring oscillator and method of measuring gate delay time in this ring oscillator  
A ring oscillator is formed by connecting three or more odd gate circuits in a ring. Each gate circuit includes a precharge dynamic gate. An output signal from the precharge dynamic gate of one...
6150892 Method and device for digitally synthesizing frequency  
A method and device for frequency synthesizing, in which the digital frequency synthesizer includes a clock pair having two similar ring-oscillators to separately generate a search frequency and an...
6148052 Digital phase detector with ring oscillator capture and inverter delay calibration  
A DPD (digital phase error) circuit for measuring the phase skew between a first and a second clock signal for use in a variety of control systems and more particularly for use in DPLL (digital...
6144242 Controllable delays in multiple synchronized signals for reduced electromagnetic interference at peak frequencies  
Multiple controllable delays reduce EMI radiated during the transmission of multiple synchronized signals. Each controllable delay introduces a controlled delay into a corresponding signal being...
6137370 Oscillator having loop including transconductor bandpass filter  
An oscillator having a feedback loop circuit formed by two transductors and one amplifier, and two capacitors respectively connected to the outputs of these transconductors. The transconductors and...
6137371 Voltage controlled oscillator including ring-shaped inverter circuits having voltage control circuits  
In a voltage controlled oscillator including an odd number of inverter circuits connected in a ring shape, at least one of the inverter circuits is constructed by an inverter and a current control...
6137369 Ring oscillator clock generator network  
A clock generator having a ring structure and a chain structure. The ring structure is formed of an even number of serially connected distributed oscillator elements, and the chain structure is...
6134191 Oscillator for measuring on-chip delays  
A circuit separately measures one or both of the rising-edge and falling-edge signal propagation delays through a signal path of interest. The greater of these delays can then be used to establish...
6133799 Voltage controlled oscillator utilizing threshold voltage control of silicon on insulator MOSFETS  
A voltage controlled ring oscillator (VCRO) that can operate at low voltage and provide a variable periodic output. A plurality of transistors form a ring oscillator and a selected transistor in...
6127898 Ring oscillator using CMOS technology  
A ring oscillator using CMOS technology having three logic gates, including a threshold amplifier, where the transistors that set the voltage rise threshold and the voltage drop threshold in the...
6127896 Phase locked loop having control circuit for automatically operating VCO on an optimum input/output characteristic  
A phase locked loop (1) including an oscillator (5), usually made as a voltage controlled oscillator (VCO), arranged to operate selectively according to different input/output characteristics. The...
6127871 Variable digital delay line  
Described is a variable digital delay cell with a first input for receiving a first input signal to be delayed, a first output for providing a first output signal which is delayed with respect to...
6114914 Fractional synthesis scheme for generating periodic signals  
An apparatus comprising a first circuit, a second circuit and a third circuit. The first circuit may be configured to generate an output signal having a first frequency in response to (i) an input...
6114917 Analog PLL circuit and method of controlling the oscillation of a voltage controlled oscillator  
The present invention provides an analog PLL circuit able to shorten a lockin time during which oscillating frequency and phase of a voltage controlling oscillator settle. An analog PLL circuit...
6114915 Programmable wide-range frequency synthesizer  
Method and circuitry for a frequency synthesizer having wide operating frequency range. The frequency synthesizer uses multiple programmable loadable counters in a phase-locked loop arrangement to...
6114920 Self-calibrating voltage-controlled oscillator for asynchronous phase applications  
A circuit, such as a phase-lock loop (PLL), has an oscillator having a plurality of operating curves. During circuit auto-trim operations, the oscillator is automatically trimmed to an appropriate...
6111456 Semiconductor circuit  
A semiconductor circuit comprises an I-type of NMOS transistors N15 and N16 connected between a power supply voltage VDD and a ground electrode. The gate electrode of the NMOS transistor N15 is set...
6107894 Coupled sawtooth oscillator  
Relaxation oscillator comprising a chain of coupled sawtooth generator stages. Each stage has a capacitor which is charged and discharged. The charging of a capacitor begins when the voltage (C C1...
6104254 VCO in CMOS technology having an operating frequency of 1 GHz and greater  
The present invention comprises a CMOS voltage controlled oscillator (VCO) circuit for operation at frequencies of 1 GHz and above. The circuit of the present invention includes a...
6104326 Bit synchronization apparatus for recovering high speed NRZ data  
An apparatus for recovering high speed NRZ (non-return to zero) data is disclosed. A phase-locked loop (PLL) frequency-divides the frequency which is outputted from a voltage-controlled ring...
6104256 Device with an oscillator circuit  
An oscillator circuit contains a switching circuit which periodically charges and discharges a capacitive node. The capacitive node is coupled to the input of the switching circuit via a loop...
6104253 Integrated circuits having cooperative ring oscillator clock circuits therein to minimize clock skew  
Integrated circuits having cooperative ring oscillator clock circuits therein include a plurality of synchronous and asynchronous active devices on the substrate and a plurality of "cooperative"...
6100769 Differential delay circuit for a voltage-controlled oscillator  
A differential delay circuit type ring oscillator allows for an increase in operation enabling frequency and dynamic range. At each stage of the ring, delay circuit output signals arc linearly...
6100768 Ring oscillator generating pulse signal at constant pulse period under unstable power voltage  
A ring oscillator has first inverters and second inverters connected in such a manner as to form a loop; the first inverters are powered through a current controller controlling the first inverters...
6097256 Complementary metal-oxide semiconductor high-frequency ring oscillator  
A CMOS (complementary metal-oxide semiconductor) high-frequency ring oscillator is provided for generating an output frequency in response to a control voltage in a wide bandwidth. The ring...
6094103 Multiple feedback loop ring oscillator and delay cell  
Disclosed is a multiple feedback loop ring oscillator and delay cell with high oscillation voltage. It is an object of the present invention to implement a new ring oscillator for the VCO of a high...
6094081 Digital controlled oscillation circuit and PLL circuit  
A digital controlled oscillation circuit which has a wide oscillation frequency range and continuous and smooth transition of the oscillation frequency and can prevent occurrence of jitter: in...
6087903 Voltage-controlled oscillator with variable output frequency from oscillation circuit  
A voltage-controlled oscillator has a feedback circuit connected to the gate of a transistor which controls a current flowing through an oscillation unit. The feedback circuit applies a voltage...
6084483 Internal oscillator circuit including a ring oscillator controlled by a voltage regulator circuit  
An oscillator circuit residing internally to a semiconductor device for generating a clock signal for use by digital circuits. The oscillator circuit includes a voltage regulator circuit responsive...
6081165 Ring oscillator  
An improved ring oscillator (10, 70) includes a first, second and third current starved inverters (12, 14, 16) coupled in a ring, a first fast inverter (40) coupled between the second and third...
6081166 Voltage controlled oscillator including a plurality of buffer circuits diodes, current sources, MIS capacitors  
A voltage controlled oscillator which causes little interference to and receives little interference from other circuits via a parasitic capacitance of an integrated capacitor, has a good control...
6075419 High speed wide tuning range multi-phase output ring oscillator  
A ring oscillator comprising: a plurality of sub-feedback loops, each comprising a pair of serially connected inverters and a feedback inverter having its input coupled to the output of the pair of...
6075415 Digital frequency multiplier  
A digital frequency multiplier is provided that continues to adjust its multiplied frequency after the desired multiplied frequency is reached, that can be tested during operation and that is...
6075418 System with downstream set or clear for measuring signal propagation delays on integrated circuits  
A circuit separately measures a selected one of the rising-edge and falling-edge signal propagation delays through one or more circuits of interest. A number of synchronous components are...
6075417 Ring oscillator test structure  
An improved oscillator test structure is disclosed. A structure according to one embodiment includes an odd plurality of first transistor pairs formed on a predetermined area of a semiconductor...
Matches 501 - 550 out of 1023 < 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 >