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7589586 High frequency signal detection circuit  
A high frequency signal detection circuit includes an input terminal for a high frequency signal to be detected, a switch transferring the high frequency signal as intermittent ringing signal to a...
7538624 Oscillator having multiple oscillation units  
The present invention is an oscillator including: first transistors outputting oscillation signals of different oscillation frequencies to collectors; a common node to which outputs of emitters of...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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....
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...
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...
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...
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...
6215369 Controllable oscillator with feedback for reducing DC level of output signals  
A controllable oscillator, comprising a first (R c ,M s1 ,M s2 ,R' c ') and a second (R 1 ,M i1 ,M i2 ,R 2 ) amplifier which are provided with inputs (V cc ,V ee ) for supply voltage and at least...
RE37124 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...
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...
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...
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...
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...
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...
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...
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...
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...
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....
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...
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...
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...
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...
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...
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...
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...
5410277 Stabilized frequency synthesizer  
A frequency synthesizer, which controls the fluctuation of frequency not only of a long period but also a short period, ensures a wide frequency control range and can be realized at a low cost, can...
5172078 Differential oscillator with common mode control  
An oscillator circuit uses a differential oscillator and differential amplifier to generate a symmetrical single-ended output signal. The differential oscillator generates a differential oscillator...
4968952 Voltage control oscillator with automatic current control  
An automatic voltage-controlled oscillator (VCO) current control circuit, that senses a voltage in the VCO representative of the current of the VCO, compares that voltage to a reference voltage,...
4818952 Oscillation circuit  
An oscillation circuit for an integrated circuit device. The oscillation circuit includes a band-pass filter for producing an output signal having a voltage and a defined resonance frequency and a...
4818903 Time constant automatic adjustment circuit for a filter circuit  
An automatic adjustment circuit for adjusting the time constant of a filter circuit. The adjustment circuit includes a source of reference frequency signal, an oscillator for generating an...
4783620 Constant voltage circuit having an operation-stop function  
A constant voltage circuit comprises a capacitor connected between one end of a MOS transistor controlled by an operation-stop control signal and an output terminal of an inverter for inverting the...
4728908 Oscillator circuit utilizing multiple semiconductor devices  
An improved oscillator circuit utilizing multiple semiconductor devices, such as field-effect transistors or bipolar transistors, is disclosed. To improve the gain of the oscillator circuit...
4727340 Comb generators  
A circuit for generating a succession of fast rising voltage pulses comprises an inductor connected between first and second circuit nodes, a step recovery diode connected between a reference...
4660001 Three-terminal negative admittance network  
Three-terminal negative admittance networks are disclosed. The preferred networks include either a bipolar junction transistor or a field-effect transistor phase shift mechanisms are used to...
4635002 Metal oxide semiconductor logarithmic voltage controlled oscillator  
Voltage controlled oscillator (50) provides an exponential transfer function. The frequency of the output signal of the voltage controlled oscillator varies exponentially with the input voltages (V...
4621239 Gallium arsenide travelling-wave transistor oscillators for millimeter wave applications  
The disclosure relates to a gallium arsenide travelling-wave transistor oscillator which extends the oscillation frequency of the individual FETs by connecting them in parallel across a pair of...
4620226 Apparatus for producing audio and visual signals for modulating a television system carrier signal  
A television signal generator for producing a composite RF signal without high level intermodulation products. A signal network is provided to linearly combine a first video modulated carrier...
4613829 Switchable oscillator circuit  
An oscillator circuit operable in different modes. The oscillator circuit, when operated as a crystal oscillator, is initially operated as a standard inverter oscillator requiring a low start-up...
4554614 Electric circuit assembly comprising a printed wiring board  
A supporting plate having a network of conductors, on which supporting plate a number of circuit components are placed which are interconnected in the network of conductors in an electric circuit....
4511861 VCO Having field effect and bipolar transistors in parallel  
The gain margin of a junction FET oscillator is improved by the addition thereto of a bipolar transistor in parallel with the FET for boosting the closed loop circuit gain of the oscillator without...
Matches 1 - 50 out of 188 1 2 3 4 >