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Matches 501 - 550 out of 1,844

Document Document Title
JP4812765B2  
JP4787114B2  
JP2011171784A
To provide a PLL circuit reducing phase noise and facilitating design.In the PLL circuit, a PLL 3 inputs a reference frequency and an output from a VC-TCXO 4, and performs a lock operation. In a lock state, a selector 6 selects the outpu...  
JP2011160081A
To provide a method for generating adjustment data of a temperature characteristic which can reduce the influence of an n-th temperature coefficient and suppress an increase in cost when adjusting the (n-1)-th temperature coefficient of ...  
JP4713556B2  
JP2011124838A
To perform delay time control at high speed, and to improve performance.A temperature sensor S1 detects a temperature to be outputted as temperature information. A TAP holding circuit S2 locks a DLL circuit S4 within a use temperature ra...  
JP2011518535A
Technique for compensating influence of a temperature change on voltage controlled oscillator (VCO) frequency is indicated. Auxiliary Bala Cuthah is combined with LC tank of VCO in one embodiment. Auxiliary Bala Cuthah has the capacitanc...  
JP4695110B2  
JP4691024B2  
JP4683153B2  
JP4680600B2  
JP4665501B2  
JP4666564B2  
JPWO2009063612A1
比較器(4)の出力信号に基づいて発振信号 を出力する発振器(5)と、発振器(5)の 出力信号を制御部(7)からの制御に基づい て分周する分周器(6)と、予め設定し...  
JP2011061421A
To obtain a digital phase locked loop having a hold over function which suppresses an influence over temperature characteristics and aging during a hold over period, and maintains high stability of frequencies.The digital phase locked lo...  
JP4656103B2  
JP2011049877A
To make frequency control of a clock signal more properly.A table value TVAL is outputted from a set point storing circuit 13 according to the frequency of a monitor signal MS as a monitor result by a ring oscillator 16 of a monitor circ...  
JP2011040967A
To provide a PLL circuit capable of automatically correcting aging characteristics and reducing output frequency fluctuation when an external reference signal is not connected or unlocked.In the PLL circuit, when a reference signal is in...  
JP2011024207A
To provide a method for use in a device having a local oscillator.The method includes a step of training at least two mathematical models of an oscillator so as to find a prediction correction signal for each mathematical model on the ba...  
JP4624796B2  
JP4620188B2  
JP4620931B2  
JP2011010343A
To provide a temperature stabilized voltage-controlled oscillator.An integrated circuit voltage-controlled oscillator (VCO) in a battery-powered device, such as cellular phone, can be configured to tune across a fairly wide frequency ran...  
JP4607108B2  
JP2010278491A
To provide a frequency synthesizer for increasing variation resistance and compensating the frequency variation of a VCO when a temperature fluctuates.The VCO 5, a phase comparator 2 for phase-comparing signals 22 for which the oscillati...  
JP2010273063A
To provide an oscillation circuit with temperature characteristic correction function without using a memory for correcting an oscillation frequency or the like, and a manufacturing method for the oscillation circuit.The oscillation circ...  
JP2010263504A
To provide an electronic apparatus for reducing size and costs as compared with a case when a double oven type OCXO is used while maintaining frequency stability the same as the case when the double oven type OCXO is used.A base station ...  
JP2010263503A
To provide a communication apparatus to be operated by using a highly precise clock signal without using a double oven type OCXO even during a period in which a GPS signal can not be normally received.A radio base station includes: a gen...  
JP2010252126A
To provide a PLL circuit capable of reducing deterioration in phase noise caused by temperature variation.The PLL circuit 100 includes: a voltage controlled oscillator circuit 81; a frequency divider 82; a phase comparator which compares...  
JP4564956B2  
JP4542598B2  
JP2010200289A
To provide a reference frequency control circuit for suppressing the change of the oscillation frequency of an oscillator circuit which generates a reference frequency.A reference frequency control circuit includes: a frequency voltage c...  
JP2010200051A
To provide a reference frequency generator that precisely acquires a self-start control signal, even if an operation environment lies temporarily outside the normal environment, while acquiring a reference signal.The reference signal gen...  
JP4513742B2  
JP2010161343A
To provide a temperature-compensated-resistance (TCR) circuit, which may be a part of an integrated circuit. The TCR circuit 100 includes two resistors 110, 120 and a diode 130. The two resistors are connected in parallel and the diode i...  
JP2010152911A
To maintain internal power supply voltage at a constant level by compensating voltage fluctuation caused by process change in manufacturing an internal power supply circuit. The circuit includes: a reference voltage generation part 40 wh...  
JP4499457B2  
JP2010147652A
To provide a method of setting a temperature compensation value for a temperature compensation type crystal oscillator capable of acquiring a temperature compensation value of a D/A converter at each temperature in a short time. In the t...  
JP4487937B2  
JP2010119074A
To provide a control circuitry which corrects a temperature drift possibly occurring to a synthesizer during a continuous operation.The control circuitry comprises: first control means operable to generate a first control signal, the fir...  
JP4462371B2  
JP4460588B2  
JP2010103671A
To furthermore reduce the power consumption of a semiconductor integrated circuit for a real-time clock and to make a generated clock signal available even in peripheral circuits.The semiconductor integrated circuit includes:a constant v...  
JP4459911B2  
JP4452444B2  
JP2010088123A
To provide a piezoelectric oscillator shortening an acquisition time of a positioning signal of a GPS satellite by using a piezoelectric oscillator having no temperature compensating circuit incorporated, and also to provide a reception ...  
JP4450729B2  
JP2010068065A
To generate highly accurate reference frequency signals by suppressing the influence of various kinds of frequency variation elements related to temperature.A control part 10 observes the level of a synchronizing type control voltage sig...  
JP2010050973A
To provide a temperature-independent LC type oscillator which meets the requirements of frequency stability and jitter, and utilizes an integration resolving technique depending upon an existing optimum process procedure in the CMOS tech...  
JP2010506523A
Representation measured value which shows relative oscillation speed of a reference clock in a representation calibration period is checked. A plurality of calibration periods containing the 1st and 2nd calibration periods are defined. 1...  

Matches 501 - 550 out of 1,844