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| Number | Title | Issue Date |
| 7952443 | Oscillating system and assistant measuring circuit for oscillator An assistant measuring circuit for an oscillator is provided. The oscillator provides N oscillating signals with different phases. The assistant measuring circuit includes N buffers, N reflection-type modulators, and a controller. An ith buffer among the N buffers r... | 05/31/2011 |
| 7295079 | Current-controlled oscillator The present invention provides a current controlled oscillator comprising a first section providing a first differential output and a second section providing a second differential output. A loading structure comprised of resistive and reactive elements electrically... | 11/13/2007 |
| 7139548 | Semiconductor integrated circuit device and wireless communication system A semiconductor integrated circuit device has an oscillation circuit using either an oscillator or an oscillation module, as an external part of a reference oscillation circuit. Two external terminals are provided in correspondence with the oscillation circuit. A co... | 11/21/2006 |
| 7135907 | Clock signal distribution utilizing differential sinusoidal signal pair A differential sinusoidal signal pair is generated on an integrated circuit (IC). The differential sinusoidal signal pair is distributed to clock receiver circuits, which may be differential amplifiers. The clock receiver circuits receive the differential sinusoidal... | 11/14/2006 |
| 7116183 | Temperature compensated voltage controlled oscillator A VCO with temperature compensation is achieved using reverse biased diodes. The VCO includes an amplifier that provides the required signal gain, a resonator tank circuit that provides the required phase shift, and at least one frequency tuning circuit for tuning t... | 10/03/2006 |
| 7071757 | Clock signal distribution utilizing differential sinusoidal signal pair A differential sinusoidal signal pair is generated on an integrated circuit (IC). The differential sinusoidal signal pair is distributed to clock receiver circuits, which may be differential amplifiers. The clock receiver circuits receive the differential sinusoidal... | 07/04/2006 |
| 7002421 | Method and circuit for compensating MOSFET capacitance variations in integrated circuits A method for tracking the MOS oxide thickness by the native threshold voltage of a “native” MOS transistor without channel implantation for the purpose of compensating MOS capacitance variations is achieved. The invention makes use of the fact that in MOS device... | 02/21/2006 |
| 6949982 | Voltage controlled oscillators incorporating parascan R varactors A voltage controlled oscillator incorporating voltage tunable capactiors, comprising at least one resonator coupled into a base circuit of a bipolar transistor, said at least one resonator including at least one voltage tunable capacitor. The bipolar transistor incl... | 09/27/2005 |
| 6940355 | Circular geometry oscillators An integrated voltage controlled oscillator is provided. The integrated voltage controlled oscillator includes a first slab inductor having two ends and a second slab inductor having two ends. A first oscillator core is connected to a first end of the first slab ind... | 09/06/2005 |
| 6924708 | Oscillator circuit having an expanded operating range An oscillator circuit having an expanded operating range includes an amplifier portion amplifying an oscillating signal. A gain controlling portion controls the gain of the amplified oscillating signal. A switching circuit electrically connected across the gain cont... | 08/02/2005 |
| 6914493 | Noise resistant low phase noise, frequency tracking oscillators and methods of operating the same To secure the benefits of a low phase noise, wide tune range SAW oscillator in noisy environments, the tunable two port SAW resonator circuit within the oscillator is employed in differential mode, connected to a differential amplifier circuit to create a differenti... | 07/05/2005 |
| 6791426 | Balanced oscillator and electronic apparatus including the same A balanced oscillator includes a differential oscillator circuit having two output terminals, and a differential amplifier circuit having two input terminals each being connected with a respective one of the two output terminals of the differential oscillator circui... | 09/14/2004 |
| 6690245 | Oscillation control circuit An oscillation control circuit is offered which can improve the startability of an oscillator circuit operating at high frequencies and at a low power-supply voltage. When the oscillation potential of the oscillation signal is between the inversion potent... | 02/10/2004 |
| 6664862 | Oscillator with constant output level over oscillation frequency range An oscillator includes an oscillation circuit unit and an amplification circuit unit of the common-base type. The oscillation circuit unit includes an oscillation transistor and a resonance circuit, the collector of the oscillation transistor being ground... | 12/16/2003 |
| 6593822 | Oscillator for achieving stable oscillation An oscillator includes an oscillator circuit which includes an oscillator transistor and a resonant circuit. The oscillator circuit can change an oscillation frequency. An amplifier circuit receives an oscillation signal output from the oscillator circuit... | 07/15/2003 |
| 6552621 | Low phase noise, wide tuning range oscillator utilizing a one port SAW resonator and method of operation There is disclosed a SAW resonator-based oscillator circuit having low phase noise that is tunable across a comparatively wide frequency range. The oscillator circuit comprises: 1) a tuning element coupled to the input port and having a variable capacitan... | 04/22/2003 |
| 6509806 | Adjusting untrimmed VCO during operation of the oscillator A frequency oscillator tuning process at the manufacturing stage is replaced with an adjustment of a resonant circuit in the frequency oscillator during an operation of the oscillator. The adjustment utilizes a crystal oscillator, a frequency oscillator s... | 01/21/2003 |
| 6492879 | Voltage-controlled oscillator A voltage-controlled oscillator (VCO) using a transistor, capable of-using a capacitor for DC blocking with small capacitance and achieving a large amount of change in the oscillating frequency. The voltage-controlled oscillator comprises a transistor for... | 12/10/2002 |
| 6359489 | Clock signal generation and buffer circuit having high noise immunity and low power consumption A crystal oscillator circuit includes an oscillator gain stage, an intermediate amplifier, a high frequency noise filter, an output buffer and a power supply noise filter. The oscillator gain stage has a voltage reduction circuit for adjusting the voltage... | 03/19/2002 |
| 6326858 | Oscillator circuit with thermal feedback An oscillator circuit which translates energy between electromagnetic energy and thermal energy is disclosed. The control loop of the oscillator includes a feed forward stage and a feedback stage for establishing the necessary conditions for oscillation. ... | 12/04/2001 |
| 6297706 | Single stage voltage controlled ring oscillator A single stage voltage controlled ring oscillator includes a trans-admittance voltage-to-current circuit coupled to a trans-impedance voltage-to-current circuit. The output of the trans-impedance circuit is connected to the input of the trans-admittance c... | 10/02/2001 |
| 6239661 | Transmitter and an oscillator network for use in the transmitter A transmitter having an integratable quadrature oscillator network for simultaneously producing a sine wave and a cosine wave. The digital direction of rotation (whether the frequency is positive or negative) input is slow rate limited (R, C3) and fed int... | 05/29/2001 |
| 6215369 | Controllable oscillator with feedback for reducing DC level of output signals A controllable oscillator, comprising a first (Rc,Ms1,Ms2,R'c') and a second (R1,Mi1,Mi2,R2) amplifier which are provided with inputs (Vcc,Vee) f... | 04/10/2001 |
| 6201449 | Ferromagnetic tuning ring for YIG oscillators A YIG oscillator is provided having a YIG sphere magnetically coupled to a permanent magnet, a field straightener, and a ferromagnetic ring. The field straightener is attached to the permanent magnet and has a predetermined circumference. The ferromagneti... | 03/13/2001 |
| 6075421 | Voltage controlled oscillator A voltage controlled oscillator (1) comprising a voltage controllable variable resonant circuit (2) having a control input (Vctrl), a positive feedback input (6) and a controllable variable frequency output (7). The voltage controlled oscillator (1) also ... | 06/13/2000 |
| 6072373 | Voltage controlled oscillator with impedance regulation circuit including a switching element A voltage control oscillator capable of obtaining the desired output voltage by lowering the higher order harmonic level, is provided. Further, in the voltage control oscillator, a resonance circuit achieves the resonance by switching two different resona... | 06/06/2000 |
| 5937340 | Integrated oscillator and radio telephone using such an oscillator The invention relates to an oscillator OSC intended to provide an output signal having a frequency which is variable as a function of a tuning voltage Vtun. The oscillator OSC includes a passive part having two series-arranged variable capacitances Cs, bi... | 08/10/1999 |
| 5892410 | Method and apparatus for transmitting radio frequency signals A transmitter VCO (204) includes nodes for receiving a band selector voltage for altering the base-emitter capactance of a transistor to enable the VCO to act as an oscillator in the appropriate band, and for altering the resonator capacitance to change t... | 04/06/1999 |
| 5850163 | Active inductor oscillator with wide frequency range An active inductor oscillator includes a tank circuit for generating a first differential signal, a common-mode inverting differential buffer for generating a second differential signal in response to the first differential signal, and an integrating circ... | 12/15/1998 |
| 5841326 | Integrated oscillation circuit used for frequency conversion circuit An integrated oscillation circuit used for frequency conversion circuit in which UHF frequency conversion and VHF frequency conversion are selectively energized to use a common IF amplifier. The integrated oscillation circuit is used for a local oscillati... | 11/24/1998 |
| 5793257 | Oscillator having switching capacitors and phase-locked loop employing same A voltage-controlled oscillator has first and second switched capacitor filters, an operational amplifier, and a comparator. The first switched capacitor filter is controlled by a control clock signal to supply a positive current depending on an input vol... | 08/11/1998 |
| 5767721 | Switch circuit for FET devices having negative threshold voltages which utilize a positive voltage only A switch circuit is disclosed including a first FET device coupled in series with an input terminal and an output terminal. A second FET device coupled to the first device in a shunt configuration. The FET devices operative in a first mode to enable elect... | 06/16/1998 |
| 5758265 | Transmitting and receiving apparatus for incorporation into an integrated circuit A transmitting and receiving apparatus configured in superheterodyne form, includes a receiving circuit for receiving a signal on one channel of a predetermined pair of channels and a transmitting circuit for transmitting a signal on the other channel of ... | 05/26/1998 |
| 5714914 | High-power low-noise voltage-controlled oscillator A high power, low noise voltage-controlled oscillator (VCO) eliminates the drive-stage amplifier and costly surface-acoustic wave (SAW) inter-stage filter in a transmitter such as a cellular radiotelephone. The VCO includes a resonant circuit, an active p... | 02/03/1998 |
| 5629650 | Self-biased phase-locked loop According to the preferred embodiment, a self-biased phase-locked loop is provided that overcomes the limitations of the prior art bias methods and apparatus. In general, a self-biased current controlled semiconductor device, typically a current controlle... | 05/13/1997 |
| 5546056 | Injection-locked oscillator having non-reciprocal four port network An injection-locked oscillator having a non-reciprocal four-port network with a pair of input ports (1, 2) and a pair of output ports (3, 4) in which the signal transfer path from a first input port (1) to a first output port (3) is non-reciprocal, the si... | 08/13/1996 |
| 5525938 | Ring oscillator using current mirror inverter stages A ring oscillator having an odd number of single ended stages, each stage including two transistors connected as a current mirror. The stage provides for low-voltage performance and improved process tolerance characteristics.... | 06/11/1996 |
| 5510755 | Temperature stable voltage-controlled electronic capacitance for an oscillator A voltage-controlled capacitor includes a multiplier, having an output which serves as terminals of the controlled capacitor. The output voltage of the multiplier is applied to a reference capacitor. A signal in phase with the current in the reference cap... | 04/23/1996 |
| 5473286 | Microwave generator circuit having oscillator and controller responsive to separate wavelengths A microwave generator has its microwave frequency optically phase-locked by means of a reference frequency of a reference signal, wherein at least one portion of an electronic circuit arrangement is supplied with an optical reference carrier signal modula... | 12/05/1995 |
| 5436939 | Multi-phase clock generator and multiplier A multiphase clock generator which exhibits frequency stability in the presence of power supply noise. The clock generator of the present invention includes a phase detector for generating a phase error signal in response to the phase difference between a... | 07/25/1995 |
