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7348859 Crystal oscillator  
A crystal oscillator that outputs an oscillation output signal of an oscillator circuit oscillated by a crystal resonator as a resonation source via a buffer circuit, includes: a plurality of...
7279995 Circuit for controlling the time duration of a signal  
A circuit controls the pulse width of an output signal from a voltage controlled oscillator. The voltage controlled oscillator includes a ring oscillator comprising a plurality of series-connected...
7151416 Apparatus and method to generate a 50% duty cycle clock in a single-ended crystal oscillator  
A clock generator includes an active oscillator portion that generates an oscillating signal having a frequency determined by a resonator, such as a crystal or other type of resonator. A filter or...
7053722 Voltage controlled oscillator (VCO) with output buffer  
An oscillator system is disclosed and includes an oscillator circuit having a differential output producing a differential output signal thereat having a frequency that is a function of an input...
7053721 Oscillator having a resonant circuit and a drive circuit  
An oscillator includes a resonant circuit generating a resonant signal, a drive circuit that feeds back the resonant signal to the resonant circuit, and an output terminal connected to a given node...
6927639 Method and apparatus for generating high frequency signals by a plurality of low frequency signals with multiple phases  
Method and related apparatus for realizing frequency-multiplication by generating a high frequency signal according to a plurality of low frequency signals. The method includes: according to a...
6888417 Voltage controlled oscillator  
A folded starved inverter differential output apparatus for use in a voltage controlled oscillator includes a first polarity of two transistors that are cross-coupled and a second polarity of four...
6867656 Self-dividing oscillators  
A system for generating in-phase and quadrature phase signals is provided. The system includes a first and a second differential output, such as from a sinusoidal oscillator. A first...
6853838 Biasing circuit for degenerated differential pair  
An improved single-ended input differential pair amplifier stage comprises: 1) a first p-n-p transistor having a base terminal coupled to an input voltage; 2) a first load impedance having a first...
6771136 System and method for restoring the mark and space ratio of a clocking signal output from an oscillator  
A circuit, system, and method are provided for regulating the mark-to-space ratio of a clocking signal. In instances where the mark-to-space ratio is targeted at 1:1 (i.e., a 50% duty cycle), then...
6703905 Crystal oscillation circuit  
A crystal oscillation circuit using a crystal oscillator comprises an inverting amplifier, a buffer, and a voltage shift circuit. The voltage shift circuit operates in such a way that within...
6696898 Differential crystal oscillator  
A periodic signal generation circuit includes a differential crystal oscillator suitable for integration on a semiconductor substrate. The oscillator utilizes an external crystal as a resonator....
6556094 Oscillator circuit and integrated circuit for oscillation  
An oscillator circuit adapted for a piezoelectric oscillator which has a weak oscillation output for generating high frequencies is provided. The speed of operation of the oscillator circuit is...
6323738 Voltage-controlled ring oscillator with level converting and amplitude control circuits  
A voltage-controlled oscillator comprises a level converting circuit, an amplitude controller, a voltage-controlled oscillation section having differential delay cells connected in a ring form, and...
6320473 Integrated oscillator circuit apparatus with capacitive coupling for reducing start-up voltage  
The present invention relates to oscillator circuits for providing periodic signals. The oscillator circuit includes a crystal element having a high Q value and good stability. A high-gain...
6084484 Programmable precise frequency divider  
A programmable precise frequency divider cooperating with a low frequency crystal and an oscillating circuit is disclosed. The divider includes a low frequency oscillating circuit, a preset code...
6066991 Stabilized oscillator circuit  
A stabilized oscillator circuit is provided with a differential amplifier type oscillator circuit for generating an oscillation signal, and a differential amplifier type buffer output circuit for...
6028491 Crystal oscillator with controlled duty cycle  
An oscillator circuit having a first node oscillating with a first indeterminate duty cycle and having a second node oscillating with a predetermined second duty cycle. Both nodes oscillate at...
6016082 Low phase noise LC oscillator for microprocessor clock distribution  
A microprocessor includes an on-chip low phase noise CMOS LC capacitance oscillator. The LC oscillator is relatively insensitive to power supply fluctuations. In addition, the LC oscillator is...
6011441 Clock distribution load buffer for an integrated circuit  
A system for synchronizing circuit operation within an integrated circuit having a high frequency clock. The system includes an oscillator for providing a clock signal and a transmission line...
5963103 Temperature sensitive oscillator circuit  
A temperature sensitive oscillator circuit and control circuit which together form a current source. The temperature sensitive oscillator circuit generates an output signal which controls a...
5920234 Buffered oscillator transmitter arrangement for power specific applications having parasitic impedances  
A transmitter circuit includes an output impedance and a buffered oscillator. The buffered oscillator includes a resonator for generating a reference signal and an amplifier coupled with the...
5874865 Constant amplitude vs. frequency oscillator  
A variable frequency oscillator providing a constant amplitude with variations in frequency. The variable frequency oscillator includes: an oscillator having an input connected for receiving a...
5859573 Circuit for separating the output of an oscillator from the other parts of a mobile communication system  
The invention concerns oscillator circuits, more particularly coupling arrangements between an oscillator and an amplifier stage following the oscillator. The solution according to the invention...
5852384 Dual band oscillator circuit using strip line resonators  
A dual band oscillator circuit according to the present invention comprises an oscillator circuit portion that oscillates at a first frequency, an oscillator circuit portion that oscillates at a...
5821826 Oscillator circuit synchronization  
An apparatus and method for generating signals. According to one embodiment, the apparatus has an oscillator generating a series of signals, an output stage for transforming the series of signals...
5815042 Duty cycled control implemented within a frequency synthesizer  
A programmable frequency synthesizer comprised of a phase locked loop (PLL) including a current controlled oscillator (ICO), a level translator for receiving output signals from the ICO wherein the...
5757242 Low power consumption oscillators with output level shifters  
A low power consumption oscillator circuit is provided with an oscillator. The oscillator responds to a voltage by producing an oscillating signal at its output having an amplitude that depends on...
5748578 Colpitts type oscillator having reduced ringing and improved optical disc system utilizing same  
A Colpitts type oscillator circuit for mitigating the effects of undesired oscillator ringing when write pulses are supplied, such as those encountered in compact disc, laser disc, and...
5699021 Balanced and buffered oscillator and transmitter arrangement  
A balanced and buffered oscillator and transmitter arrangement includes a first and second oscillator, each of which include a resonator for generating a reference signal, an amplifier for...
5686868 Semiconductor integrated circuit having VCO coupled through capacitance and buffer circuits  
A semiconductor IC used for synthesizer having a phase locked loop PLL, a voltage controlled oscillator (VCO) and a mixer (MIX) for intermediate frequency is formed on a one chip silicon wafer. A...
5677649 Frequency-variable oscillator controlled high efficiency charge pump  
An integrated circuit semiconductor device includes a charge pump to provide current at a potential which is greater than a supply potential. The charge pump utilizes an oscillator, which causes...
5675294 Single pin crystal oscillator circuit  
A single pin integrated oscillator circuit includes an amplifier having a first input terminal to which an external crystal may be connected, and a second input terminal which receives a feedback...
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...
5621361 One-pin integrated crystal oscillator  
A one-pin integrated crystal oscillator in a Colpitts configuration employs a differential amplifier, provided with a feedback network, as an input gain stage. This achieves an enhanced stability...
5602514 Quadrature oscillator having a variable frequency  
A quadrature oscillator is provided constructed of NOR gates in the manner of a non-linear circuit which is inherently unstable and which cycles sequentially through four distinct states at a rate...
5600281 Oscillator circuit generating a clock signal having a temperature dependent cycle and a semiconductor memory device including the same  
In a semiconductor memory device, a constant voltage is applied to a resistor having a positive temperature coefficient, whereby a first reference current flowing through that resistor is converted...
5592128 Oscillator for generating a varying amplitude feed forward PFC modulation ramp  
An oscillator for generating a varying amplitude feed forward power factor correction (PFC) modulation ramp signal includes a clock generating circuit and a ramp generating circuit. The PFC ramp...
5578970 BICMOS monolithic microwave oscillator using negative resistance cell  
A monolithic microwave oscillator using a negative resistance cell includes a resonator, a negative resistance cell that employs an active device, an output buffer for voltage and current...
5568095 Balanced oscillator and transmitter arrangement  
The present invention teaches an oscillator and transmitter. The balanced oscillator comprises a resonator for generating a reference signal having a resonating frequency, a first oscillator for...
5559477 Pulse generator having controlled delay to control duty cycle  
Five CMOS inverters are connected in a series ring to form an oscillator. Current to the inverters is controlled to establish gate delays of the inverters and thereby determine a frequency of...
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...
5517148 Low current differential level shifter  
The low current level shifter stage of an oscillator circuitry having stable frequency response and low total current consumption over a wide range of supply voltage is comprised of a current...
5485126 Ring oscillator circuit having output with fifty percent duty cycle  
A ring oscillator circuit which provides an output signal having a substantially constant, fifty (50%) percent duty cycle. The circuit includes a plurality of cascaded inverting stages, each of...
5483205 Low power oscillator  
An oscillator circuit (150) is designed with a reference circuit (102), responsive to a first voltage, for producing a second voltage. An oscillator (108), responsive to the second voltage,...
5463354 Proximity switches including long tail pair with emitter follower feedback  
A proximity switch circuit including first and second transistors Q4, Q6 connected as a long tail pair with an inductive sensing circuit LC connected to one leg thereof and an emitter follower...
5422605 Low-noise push-pull crystal oscillator  
A low phase noise oscillator 10 having a balanced feedback transformer 24 and a push-pull resonant circuit 12 for generating an oscillation excitation signal. The resonant circuit 12 is loaded by...
5339052 Oscillator circuit having a fifty percent duty cycle  
An oscillator circuit having a 50% duty cycle comprises an oscillating stage and an output stage. The output stage comprises a series arrangement of first and second output transistors of...
5268657 High performance oscillator circuit with minimum frequency pulling at power on  
A high performance oscillator with low frequency pulling at turn on includes an oscillator transistor, a resonating element and a common base buffer transistor. The resonating element of the...
Matches 1 - 50 out of 192 1 2 3 4 >