Matches 51 - 100 out of 305 < 1 2 3 4 5 6 7 >
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6259329 Reference-frequency-signal switching circuit  
A reference-frequency-signal switching circuit includes an internal reference-frequency-signal oscillator for generating an internal reference-frequency signal, a reference-frequency-signal input...
6211774 Electronic horn and method for mimicking a multi-frequency tone  
An electronic horn for mimicking a multi-frequency tone includes a wave signal generator for generating an input signal and a complex signal generator for generating a complex signal across a...
6191662 Self-start circuits for low-power clock oscillators  
A clock circuit includes an oscillator having a biasing node that causes the oscillator to enter a low-power state. The clock circuit also includes a kick-start circuit and a first mechanism. The...
6188286 Method and system for synchronizing multiple subsystems using one voltage-controlled oscillator  
A method for synchronizing multiple subsystems using one voltage-controlled oscillator. The method includes transmitting a phase and frequency aligned output of a voltage-controlled oscillator to...
6169462 Oscillator with controlled current source for start stop control  
A first inverter is provided with a feedback resistor for biasing the inverter to a linear operating range and an AC feedback path for causing oscillations to occur. A controlled current source,...
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...
6157265 Programmable multi-scheme clocking circuit  
A programmable multi-scheme clocking circuit supports multiple applications. In one implementation, the clocking circuit includes multiple clock sources such as a crystal oscillator, a RC...
6133798 Oscillation system  
In plural oscillation systems each of which can be described by the van der Pol equation, each oscillation system is reciprocally connected with at least one oscillation system other than the own...
6066988 Phase locked loop circuit with high stability having a reset signal generating circuit  
A phase locked loop circuit includes a reset signal generating circuit for generating a reference clock signal and a reset signal from an input clock signal. A phase locked loop section generates...
6060955 Voltage compensated oscillator and method therefor  
A voltage compensated oscillator circuit having a resistor capacitor (RC) circuit for setting a frequency of oscillation for the oscillator circuit. A switching circuit with hysterisis is coupled...
6057742 Low power oscillator having fast start-up times  
A low power oscillator having fast start-up times. The low power fast starting oscillator uses an oscillator circuit having an input and an output for generating a signal of a desired frequency. A...
6025757 Piezoelectric oscillator circuit  
There is disclosed an oscillator circuit comprising the first load capacitor with one electrode there of being connected with an input side of a CMOS inverter within a quartz oscillator circuit,...
6011445 Method for oscillating and start up circuit for oscillator  
The present invention provides a reliable method for oscillating an oscillator having an oscillator output without fail. The method includes steps of detecting whether the oscillator is regularly...
5929713 Oscillating circuitry built in integrated circuitry  
Oscillating circuitry built in integrated circuitry (1) comprises a ring oscillator (31) for generating a first clock, an external oscillator (40) capable of generating a second clock in either one...
5909152 Low power CMOS crystal oscillator circuit  
A crystal-stabilized integrated-circuit oscillator which uses a filtered analog coupling to automatically disable the bias current to an auxiliary gain after startup. Positive feedback is used to...
5905759 Data decoding circuit, voltage-controlled oscillation circuit, data decoding system and electronic equipment  
A data decoding circuit of the present invention can regenerate a bit synchronization signal from a data received by using a code such as a split-phase code and Manchester code in which a binary...
5900787 Dual-mode, crystal resonator/external clock, oscillator circuit  
An oscillator circuit, having an inverter with input and output terminals interconnected through a feedback resistance, operates in two modes. In a first mode, the input and output terminals are...
5889442 Crystal oscillator starting operation in an electricity meter  
Methods and apparatus for controlling operation of a low frequency oscillator upon reset of a microcomputer to achieve faster start-up time are described. In one aspect, the present invention is...
5889441 Temperature and voltage independent on-chip oscillator system and method  
A system and method for ensuring a substantially constant oscillator frequency that is substantially independent of the operating temperature and is substantially independent of variations of the...
5825255 Oscillator starting circuit  
An oscillator in which the transconductance of an amplification transistor (T0) is limited through a measurement of the potential at the input electrode (G0) of the amplification transistor (T0) by...
5805027 Low current crystal oscillator with fast start-up time  
Crystal oscillator circuitry provides a very fast start-up function requiring less than 100 mS. The crystal oscillator circuitry enters a stop mode when a control signal transitions from a first...
5754081 Clock signal generation and test circuitry  
The present invention provides a semiconductor device wherein the oscillation of a clock signal oscillation circuit is halted by control carried out by a CPU when a clock-signal switching circuit...
5721515 High stability single-port saw resonator oscillator  
A high stability clock oscillator circuit that has no inductors in the oscillator circuit itself. In the preferred embodiment neither the collector, the base, nor the emitter of the transistor is...
5650670 Induction charge microwave pulse generator having a split ground plane  
Complex and multi-cycle microwave pulse waveforms are generated by the transient discharge of an induction charged transmission line using only one fast switch. An essential feature of the...
5640130 On-off controlled oscillator with circuit for masking glitches  
An oscillating circuit body 10 includes a first two-input NAND gate, a feedback resistor, a resonator and capacitors. One input terminal of the NAND gate functions as a control terminal to which is...
5640129 Switching RF generator and modulator  
An electrical signal generator for generating an output signal of predetermined frequency has an oscillator of predetermined frequency operable to produce a first signal of said frequency, which is...
5629652 Band-switchable, low-noise voltage controlled oscillator (VCO) for use with low-q resonator elements  
Both differential and single-ended band-switchable VCOs are described. The single-ended version of the voltage controlled oscillator in its most basic form includes a load, two transistors, two...
5625326 Lock alarm circuit of a synthesizer  
A signal of a locking detector of a synthesizer indicates in a first state that a loop is locked, and in a second state that the loop is unlocked. The synthesizer may be temporarily deactivated by...
5623233 Pulsed optically injection locked MESFET oscillator  
An optically controlled MESFET semiconductor oscillator assembly having a MESFET semiconductor which, when voltage biased by a pulsed dc voltage, oscillates at a free running frequency; an optical...
5610558 Controlled tracking of oscillators in a circuit with multiple frequency sensitive elements  
An oscillator circuit (143) comprises a master phase-locked loop (PLL) circuit (202) that receives as input a first reference frequency signal (136) and generates a first clock signal (210) in...
5608357 High speed phase aligner with jitter removal  
A data retiming system for retiming incoming data and eliminating jitter is described. The data retiming system includes a local clock; a phase aligner for receiving the incoming data and producing...
5606292 Ring oscillator having its output amplified in a comparator  
A ring oscillator for a semiconductor device comprising a ring oscillation circuit for generating a pulse signal according to a logic state of a control signal, the pulse signal having a...
5606293 Clock generator for microcomputer having reduced start-up time  
A harmonic of a resonance frequency of an oscillator, which occurs at the initial stage of the oscillation of the oscillator, is divided to obtain a pulse to be used as a clock for the operation of...
5568100 Synchronous power down clock oscillator device  
This invention provides a synchronous, power down oscillating device that provides only uniform pulses having no glitches at its output. The circuit is able to provide a synchronous output for two...
5561400 Oscillator unit  
An electrical circuit for reliably starting the oscillation of an oscillator comprising a cylindrical piezoelectric body on which an exciting electrode, a feedback electrode which causes an...
5557243 Oscillation circuit with power limiting controller  
An oscillation circuit employs a piezo-electric crystal connected in parallel with an amplifier having a gain equal to or less than that needed to maintain a steady-state operation of the amplifier...
5552751 Low voltage, low power oscillator having voltage level shifting circuit  
An oscillator circuit (30, 40) for starting-up and operating at low voltages has been provided. The oscillator circuit includes an inverter circuit(31, 41) coupled across first and second terminals...
5548249 Clock generator and method for generating a clock  
The clock generator of this invention includes: an input shutoff control circuit for receiving a base clock and a reference clock and outputting a first signal and a second signal in response to a...
5548252 Digital temperature compensated crystal oscillator  
A digital control system such as a digital temperature compensated crystal oscillator (DTCXO) system is arranged to offer superior oscillating performance with reduced size and cost. For example,...
5546054 Current source having voltage stabilizing element  
A current source including a current mirror circuit and an active load circuit which form a reference branch, for setting a reference current value, and a mirroring branch, defining an output...
5534826 Oscillator with increased reliability start up  
Oscillation is easily and reliably initiated in an oscillator by increasing the gain of the circuit at startup time. For example, the gain of an oscillator circuit may be increased at startup by...
5532653 Supply voltage compensated charge pump oscillator  
A charge pump oscillator for regulating an oscillator frequency over a wide range of supply voltages is disclosed. Such a charge pump oscillator provides a charge pump system that provides a...
5532652 Oscillation circuit with enable/disable frequency stabilization  
An oscillation circuit in which the driving performance of a CMOS transistor therein for enabling/disabling an oscillating function is enhanced without unstabilizing the oscillation operation, by...
5528200 Ring oscillator and pulse phase difference encoding circuit  
A ring oscillator for circulating pulse edges of two types therein includes an even number of inverting circuits connected in a ring. Each of the inverting circuits is operative to invert an input...
5523724 Fast recovering charge pump for controlling a VCO in a low power clocking circuit  
A low power clocking circuit includes a crystal oscillator for generating a digital signal having a first frequency. The first frequency is relatively slow which allows the crystal oscillator to...
5519360 Ring oscillator enable circuit with immediate shutdown  
An integrated memory circuit is described which includes a charge pump for producing a pumped voltage and a ring oscillator coupled to the charge pump. The ring oscillator is used to operate the...
5517158 Self-timed oscillator circuit including starting and stopping circuitry  
A relatively simple low-power-dissipation oscillator circuit comprises an inductor in series with a capacitor. Self-timing circuitry connected to an output node point between the inductor and the...
5515011 Pulsed magnetron circuit with phase locked loop  
A semiconductor diode is connected across the cathode-to-anode path of a magnetron and through a storage capacitor and collector resistor to a supply voltage for enabling charging of the capacitor....
5491456 Oscillator compensated for improved frequency stability  
An oscillator is provided for use in integrated circuits of the type that are employed in various, relatively low power, power management systems such as can be found in mobile communications...
5475345 Ultra-fast MOS device circuits  
A CMOS coupled-tank oscillator for VLSI circuit applications is disclosed. The coupled-tank oscillator has two inverters coupled, input-to-output, by inductances that may be simply wires, and a...
Matches 51 - 100 out of 305 < 1 2 3 4 5 6 7 >