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JP2006210967A |
To provide a rubidium atomic oscillator, wherein the generated heat from the oscillator self is drastically reduced so as to be able to use a constant temperature bath attached crystal oscillator on market the specification of a high tem...
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JP3808098B2 |
PCT No. PCT/DE96/00743 Sec. 371 Date Feb. 20, 1998 Sec. 102(e) Date Feb. 20, 1998 PCT Filed Apr. 30, 1996 PCT Pub. No. WO96/37959 PCT Pub. Date Nov. 28, 1996A telecommunications unit has an oscillating crystal as frequency standard, in w...
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JP2006173213A |
To provide a temperature stabilizing device which highly precisely stabilizes the temperature of an object.The temperature stabilizing device for stabilizing the temperature of the object to a reference temperature comprises an oscillato...
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JP2006109512A |
To provide a tunable ferroelectric multiplexer for use in CDMA communications devices.Tunable ferroelectric capacitors are used to tune the resonance frequencies of several resonators used in a multiplexer and to tune the frequency respo...
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JP3744780B2 |
To provide an oscillation circuit that can stably oscillate a signal and can operate even when power supply voltage is low. When a differential transistor(TR) Q11 is conductive, the voltage at a point A being the base of a differential T...
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JP2006033783A |
To provide an integrated circuit including a crystal oscillator emulator.An integrated circuit comprises a first circuit that receives a clock signal. A first temperature sensor senses a first temperature. Non-volatile memory that commun...
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JP2006025040A |
To provide a PLL synthesizer that can not only obtain excellent characteristics while noise from a PLL-IC side hardly enters a VCO, but also suppress an increase in current consumption due to a temperature rise.The PLL synthesizer 1 has ...
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JP3730984B2 |
To provide a function generating circuit operable at low voltage for a temperature-compensated crystal oscillator. First, second and third current conversion circuits 510, 520, 530 are cascade-connected, and current It2 proportional to t...
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JP2005348034A |
To provide a voltage-controlled oscillator which compensates the temperature characteristics of an SAW oscillator without increasing the power consumption.The voltage-controlled oscillator is composed of: a voltage-controlled SAW oscilla...
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JP2005533443A |
A current-controlled ring oscillator uses a single controlled-current supply for supplying current to each inversion stage of the ring oscillator. The controlled current is dynamically adjusted to compensate for variations in process, vo...
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JP2005312059A |
To improve an oscillator 100 in the aspect of phase jitter reduction or the like, and also to make the oscillator advantageous in space, the oscillator comprising a vibration circuit 102 comprised of vibration circuit inductance and firs...
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JP3710779B2 |
To perform correction with high accuracy by using a D/A converter with the number of bits low and suppressing quantization errors and to realize temperature correction at a low cost. An actual observation waveform of correction voltage r...
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JP2005278070A |
To always accurately detect the end of the warm-up of an OCXO (oven controlled xtal oscillator) even in the case of a change in ambient environment.Power is supplied, a consumption current i is caused to flow to the OCXO 1 through a curr...
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JP3689678B2 |
To provide a temperature-compensated crystal oscillator which reduces the height of a product. The temperature-compensated crystal oscillator 40 comprises a first substrate structure 41 composed of at least one substrate with a cavity fo...
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JP3684109B2 |
To provide the voltage-controlled oscillator circuit which can output clock signals of precise oscillation frequencies stably in a low-frequency range to a high-frequency range, even if the oscillation frequency of a voltage- controlled ...
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JP2005516519A |
A wireless transceiver includes a transmitter having a harmonic rejection mixer and an RF output phase-locked loop in a two step up-conversion architecture, and a direct conversion receiver. The transmitter includes a local oscillator fo...
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JP2005102323A |
To provide an oscillator in which a frequency shift of an oscillation circuit is varied by a connected load.A temperature compensation circuit 20 comprises an AFC adjustment circuit 30 connected to a control input terminal 34, a temperat...
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JP2005094427A |
To prevent EVM and a transmission spectrum from being deteriorated by a change in the KV characteristics of an oscillation circuit for transmission following a temperature change, when incorporating the oscillation circuit for transmissi...
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JP2005509315A |
A frequency-adjustable oscillator suitable for digital signal clock synchronization includes a crystal oscillator circuit having a voltage-variable control input that generates a drive signal and adjusts the frequency of the drive signal...
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JP3636385B2 |
PURPOSE: To provide an improved type soundness indicator of a perishable product. CONSTITUTION: A first oscillator 11 to output the first clock signal which is hardly change by the temperature is included. A second oscillator 15 outputs ...
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JP2005503707A |
An electronic circuit comprising a frequency or phase-locked loop (PLL) comprising a first input terminal (1) coupled to receive a first input signal (D); a second input terminal (2) coupled to receive a second input signal (CLK); detect...
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JP2005502227A |
The present invention quantifies and reduces losses in tunable bandpass filters having ferro-electric capacitors. Given a required insertion loss and the quality factor of a resonator, the geometric losses resulting from a particular top...
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JPWO2003021765A1 |
The oscillator 10 includes temperature compensation circuits 30 and 40, a frequency adjustment circuit 50, and an initial deviation correction circuit 60, and controls switches SW1 to SW4 based on control data DC stored in the memory 90....
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JP2004536287A |
The present invention quantifies and reduces losses in tunable bandpass filters having ferro-electric capacitors. Given a required insertion loss and the quality factor of a resonator, the geometric losses resulting from a particular top...
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JP2004304225A |
To provide a temperature compensating cubic function generating circuit of a polygon approximation system which is capable of drastically reducing power consumption.The circuit is provided with a cubic function generating circuit 10 of a...
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JP2004303208A |
To provide an oscillator in which counted accumulated running time can be stored so as not to be lost even when a power source is interrupted and electronic equipment using this.An oscillator to be operated with an external power source ...
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JP2004289877A |
To provide an oscillation self-calibrating device for correcting oscillation clock signals.The oscillation self-calibrating device comprises frequency dividers (12, 16) for receiving oscillator clock signals (CLK R, CLK T) to output firs...
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JP2004530360A |
The present invention quantifies and reduces losses in tunable bandpass filters having ferro-electric capacitors. Given a required insertion loss and the quality factor of a resonator, the geometric losses resulting from a particular top...
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JP2004524778A |
The present invention quantifies and reduces losses in tunable bandpass filters having ferro-electric capacitors. Given a required insertion loss and the quality factor of a resonator, the geometric losses resulting from a particular top...
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JP3551351B2 |
To provide a PLL(phase-locked loop) device capable of preventing the deviation of the locking of the PLL due to a temp. change and also capable of generating the reference voltage of its own with high accuracy with a resolution finer tha...
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JP2004205244A |
To implement a highly accurate electronic timepiece by correcting both rate changes to temperatures and rate changes to humidity variations due to weather transitions and the ambient environment of the timepiece.The electronic timepiece ...
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JP2004208270A |
To operate a crystal oscillator with low power by making a temperature compensator for a digital crystal oscillator into one chip.A temperature offset code is subtracted from a present temperature, a memory address storing information re...
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JP2004201280A |
To provide a voltage controlled oscillator capable of substituting for a crystal oscillator.The voltage controlled oscillator that is used as a frequency reference device in an electronic device such as a cellular phone and the other mob...
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JP3542886B2 |
To highly precisely compensate the temperature by inserting a crystal oscillator into one branch line of a CR circuit, using the circuit as a part of the feedback circuit of a high frequency amplifier circuit and oscillating the crystal ...
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JP2004172712A |
To solve the problem in a conventional transmitter-receiver used in a base station that a local oscillation circuit is not stabilized because the output level of a frequency synthesizer changes due to frequency or temperature fluctuation...
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JP2004146866A |
To provide an oscillator circuit of a simple constitution, which can improve the temperature dependency of the oscillated frequency.Inverters 1, 2, 3 are connected in series, feedback is applied from the output terminal of the inverter 3...
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JP2004072289A |
To eliminate a temperature change of an oscillation frequency, to make consumption current in an oscillation circuit to be low and to prevent a frequency adjusting circuit from being easily affected by fluctuation of power voltage of the...
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JP2004048643A |
To provide a temperature compensation piezoelectric oscillator by which an unconventionally large variable range can be obtained and high temperature stability can be obtained by an oscillator having two or more load capacity variable fu...
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JP2004048690A |
To provide a ring oscillator wherein deterioration of oscillation frequency can be prevented when power source voltage drops, temperature rises and occupied area is small.The ring oscillator is provided with a ring oscillation part 1 con...
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JP2004048686A |
To obtain a design means for preventing an electronic component or the like to be used for a high stability piezoelectric oscillator from being deteriorated by heat aging when the high temperature side of use temperatures is as high as 8...
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JP2004503977A |
To generate an accurate frequency standard in an integrated circuit, it is proposed to activate a reference oscillator at certain time intervals and to calibrate the local oscillator. For this purpose, a calibration circuit is provided, ...
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JP3492225B2 |
To provide a transmitter-receiver capable of suppressing data errors under the environment of the severe mechanical impacts and vibration of an airplane. By setting the natural angular frequency and phase comparison frequency of a PLL fr...
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JP2004023634A |
To provide a high frequency oscillation circuit that can be configured by employing a frequency synthesizer having a small change in the frequency due to a temperature variation at a low cost independently of a power supply voltage and t...
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JP3482711B2 |
PURPOSE: To apply temperature compensation to cancellation of spur in a phase locked loop. CONSTITUTION: A phase detector 110 receives a reference frequency and a feedback frequency from a reference divider 100 and provides the output of...
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JP3479475B2 |
To provide a voltage controlled crystal oscillator where a phase noise is reduced, a start characteristics is enhanced and miniaturization can be enhanced. In the voltage controlled crystal oscillator where a variable voltage capacitive ...
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JP3473400B2 |
To provide the oscillator which suppresses the influence of noise superposed on a source voltage and reduces temperature variation in oscillation frequency. A source follower circuit 40 which has a desired temperature gradient is actuali...
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JP3463499B2 |
To obtain a power-supply stabilization circuit which prevents a capacitor from being damaged any more even when the capacitor is damaged by a method wherein a fuse which is blown due to the generation of an overcurrent is installed in se...
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JP3458838B2 |
To provide a PLL circuit which detects the noise of an analog power supply and generates an alarm and which comprises the check means of the analog power supply capable of preliminarily preventing the problem that the phase of an output ...
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JP2003283304A |
To provide an oscillation device which makes a circuit scale be small and keeps an oscillation frequency almost constant to a change in power supply voltage not requiring a necessity to have a large monopolized chip area therefore.The ci...
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JP2003279639A |
To provide a software compensation type quartz oscillator.A navigation satellite receiver has a quartz oscillator depending on a local ambient temperature. A true frequency bias of the quartz oscillator is calculated locally using a rece...
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