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Matches 651 - 700 out of 1,438

Document Document Title
JP3233946B2
An approximate third-order function generator includes first, second, and third amplifiers, each receiving a common input signal and different fixed level signals. The three fixed level signals received respectively by the amplifiers seq...  
JP2001522185A
A highly stable single chip crystal controlled oscillator with automatic gain control. An amplitude detector monitors the output of a crystal controlled oscillator amplifier and produces a feedback signal proportional to the output signa...  
JP2001308833A
To realize a method for adjusting an oscillator via a packet exchange network.The packet exchange network 21 is located between the oscillator 44 and a specified time source 31, and the time source 31 knows the clock time with specified ...  
JP3221579B2
PURPOSE: To improve the frequency temperature characteristic of a voltage controlled oscillator employing an oscillating element having a large frequency temperature coefficient. CONSTITUTION: A capacitive reactance circuit 5 for tempera...  
JP2001519109A
A circuit for automatic frequency control includes an oscillator and a digital synthesis device to which a first frequency of the oscillator is supplied as a clock frequency and which generates an output signal having a second frequency....  
JP3218106B2
PURPOSE: To improve workability by serially inserting a capacitor in a resistance parallel-connected with a temperature sensing resistance and forming a temperature sensing resistance network. CONSTITUTION: Resistances R1, R2 are made ad...  
JP2001282380A
To provide a circuit for generating a clock with frequencies stable against the fluctuation of a surrounding temperature or the fluctuation of a power supply voltage being the factor of the fluctuation of frequencies. At the time of init...  
JP2001257531A
To provide a crystal oscillator which operates with the high stability of a frequency even just after the supply of power and is excellent in phase noise characteristic in a floor area.With the output of OCXO2 as reference, a PLL control...  
JP3205248B2
To eliminate an adjustment process in an IC user, to save pins and to save components by controlling a D/A conversion circuit by the serial control of a conversion circuit and supplying a prescribed current to a VCO. Optimum serial data ...  
JP3198001B2
PURPOSE: To finely adjust the frequency without adversely affecting the reduction of the size of DTCXO. CONSTITUTION: This crystal oscillator consists of a voltage output part 31a which senses the ambient temperature of a crystal vibrato...  
JP3189662B2
To provide a miniaturized temperature compensated piezoelectric oscillator capable of easily and inexpensively obtaining the signals of an oscillation frequency stable against the change of an ambient temperature. This temperature compen...  
JP3187341B2
To compensate a temperature of a reference signal oscillator for a communication equipment properly with a simple configuration. An output frequency of a reference signal oscillator 118 in a communication equipment like a radio telephone...  
JP3186500B2
PURPOSE: To reduce the fluctuation of a frequency due to temperature change and to perform a stable operation by providing a local oscillation signal generator and supplying the local oscillation signal to a mixer based on a reference si...  
JP3183494B2
PURPOSE: To generate a timing signal of high resolution and high accuracy by providing m-stages of variable delay elements, which operates by synchronizing with highly accurate clock and is stable in self heat generation, to prevent timi...  
JP2001168851A
To obtain a clock frequency generator that can output a transmission signal waveform much, including a power component with a transmission clock frequency with respect to an input of an optional data signal waveform.This clock frequency ...  
JP3174910B2
To generate at low cost a signal the frequency of which stabel with respect to temperature. An oscillator 12 generates a first signal, and an oscillator 14 generates a second signal whose frequency has more temperature dependence than th...  
JP3163205B2
PURPOSE: To provide a voltage controlled oscillator which is less affected by the fluctuation of an input voltage signal and has plural low gain frequency ranges and generates an oscillator signal with a frequency fixed against the chang...  
JP3160299B2
A temperature compensating crystal oscillation device includes a constant voltage circuit for outputting a predetermined voltage independent of the ambient temperature, a temperature sensor circuit for outputting a voltage in proportion ...  
JP3156323B2
PURPOSE: To provide the oscillation circuit in which fluctuation of the oscillated frequency is reduced. CONSTITUTION: This circuit is provided with a level exchange circuit 30 in which a signal smaller by a 3rd threshold level is output...  
JP3144700B2
A compensation circuit (14) for a ring oscillator (12) having an odd plurality of series-connected CMOS inverter stages includes first and second P-channel transistors and a resistor. The first transistor (32) has a source coupled to VDD...  
JP3142296B2
An apparatus for providing excitation of a vapor discharge lamp includes a control circuit for controlling an oscillator circuit during an ignition mode of the vapor discharge lamp to establish and maintain a substantially constant DC vo...  
JP2001036344A
To reduce worsening of phase noise characteristics due to mechanical vibrations. A 1st crystal vibrator 1a and a 2nd crystal vibrator 2 having a same characteristics are mounted closely in the same direction, an amplifier 3 and an invert...  
JP2001007714A
To operate temperature correction without generating any performance deterioration of electronic equipment by preventing influence of operation clock to be used for temperature correction processing from having adverse influence on the o...  
JP2000341354A
To extend a frequency lock range of AFC processing up to a multiple of ±1/4 of a symbol rate.A correction data generating section 125 generates correction data on the basis of a polarity of a frequency offset discriminated by a polarity...  
JP2000516430A
A frequency-drift ( DELTA F) of an oscillator (OSC) is compensated ( APPROX - DELTA F) by varying various different biassing parameters (V,I) in the oscillator. The biassing parameters (V,I) which are varied may include, for example, vol...  
JP2000332600A
To provide arbitrary temperature characteristics for a voltage, applied to the input terminal of a semiconductor device such as a voltage-controlled oscillator, by using an ordinary circuit element. A 3rd resistance R3 is connected in se...  
JP2000323926A
To compensate the temperature of a frequency with inexpensive constitution. A first oscillator 11 generates a first oscillation signal. A second oscillator 12 generates a second oscillation signal whose frequency characteristic differs f...  
JP3102396B2
A voltage controlled oscillation circuit for use in a Phase Locked Loop circuit has a plurality of voltage controlled current generating circuits(60A,60B,60C), a current adder(62), and a current controlled oscillation circuit (70). Each ...  
JP2000295099A
To realize stable output even in a high frequency band by constituting a system of a synthesizer, a multiplier, a temperature compensation circuit having an output adjusting function and an amplifier. A multiplier is connected to a synth...  
JP2000278045A
To enhance the reliability and precision of a digital temperature compensation oscillator by decreasing fluctuation in the output of the oscillator due to the noise characteristics of a temperature sensor and an A/D converter. In the dig...  
JP3092538B2  
JP3087683B2
A voltage controlled oscillator is implemented by odd inverters forming a loop, and a depletion type load transistor, a depletion type frequency control transistor and a depletion type compensating transistor supply driving current to an...  
JP3085511B2
A frequency standard generator includes a voltage controlled crystal oscillator for generating high stability output signal to be used as a standard frequency signal, a satellite wave receiver which receives a radio wave from a satellite...  
JP2000223947A
To reduce the occupying area of a crystal oscillator and also to reduce the assembly time by making a heater with a substrate formed by being bent in a U shape and arranging a crystal plate located inside the case for the crystal oscilla...  
JP3070530B2
During operation of a receiver, only when frame synchronization is established, the set value that the frequency control circuit determines for the VCO (6) is periodically stored into a non-volatile memory (11) together with current ambi...  
JP2000209030A
To stabilize the oscillation frequency of an oscillation circuit which is using a crystal vibrator, etc., in terms of temperature, etc. A resistor R1 is connected in series to a crystal vibrator X and a resistor R2 is connected in parall...  
JP2000509219A
A frequency synthesizer (200) with temperature compensation and frequently multiplication. The synthesizer (200) having a temperature uncompensated frequency oscillator (202) coupled to a phase locked loop (206) including at least one te...  
JP2000201072A
To simplify a circuit, shorten a leading time, and achieve stable operation by preliminarily applying an outside control voltage to be oscillated in the pull-in range of phase comparator means from a temperature/voltage converting means ...  
JP2000183737A
To improve a frequency temperature characteristic by providing a voltage generating means which has a cavity having a coil generating a magnetic field and a positive linear temperature coefficient characteristic and feeds prescribed volt...  
JP2000175441A
To provide a charge pump circuit for eliminating the dependence on a power supply voltage and reducing the temperature dependence.A charge pump circuit consists of a first switching element 16, that inputs a first control signal (signal ...  
JP3054558B2  
JP3050146B2
To prevent the temperature compensating operation of temperature compensated oscillator from disturbing auto-frequency control(AFC) operation to a received signal. This temperature compensated oscillator has a temperature sensor 1 to cha...  
JP2000156609A
To prevent a phase noise from being increased for a temperature compensation crystal oscillator while realizing low power consumption of the temperature compensation crystal oscillator.A constant voltage generating circuit 10 to drive a ...  
JP2000507073A
A temperature compensation (TC) circuit (10) for a crystal oscillator module (12) used in a communication device (200). An existing microcontroller (210) of the communication device (200) is used to provide TC digital data (30) for a cry...  
JP2000114930A
To provide a bias current temperature characteristic compensating circuit which maintains the temperature characteristic of the bias current of an emitter common transistor output circuit consisting of PNP and NPN transistors and does no...  
JP2000114873A
To provide a surface acoustic wave(SAW) oscillator or the like capable of compensating a temperature in a simple configuration and surely compensating the temperature even when a SAW resonator has variation in temperature characteristics...  
JP2000091890A
To realize an oscillation circuit for outputting an oscillation signal with stable frequencies under any temperature by following-up temperature change. A signal corresponding to the voltage level of the output signal of a comparator 10 ...  
JP2000077999A
To provide a semiconductor IC(integrated circuit) which can perform a stable operation against the rise of temperature and the drop of power supply voltage. A delayed clock signal DCK which passed through a delay circuit 11 is held by a ...  
JP3019340B2
A capacitor array provides a variable capacitance, having FET's as respective switching elements (10, 11, 12) for switching each capacitor (20, 21, 22) in the array on and off, and means (8) for controlling switching of the switching ele...  
JP2000036739A
To allow an oscillator which adjusts the control voltage of a voltage- controlled oscillation circuit according to a temperature detected value which is obtained by a temperature sensor to control the oscillation circuit to a constant os...  

Matches 651 - 700 out of 1,438