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JP2748740B2 |
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JPH1093346A |
To obtain such an assembly that the output frequency of a quartz oscillator has low sensitivity to the temperature of outside air by providing an annular oven heat accumulation body concentrically with a cylindrical oven chamber. A cylin...
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JPH1093428A |
To provide the digital temperature compensation oscillator in which a time for a temperature compensation data generating job is reduced. The digital temperature compensation oscillator 11 is provided with a switch circuit 6, a data writ...
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JPH1093468A |
To provide a radio equipment in which frequency drift of an oscillator is compensated on the site and the service for frequency drift compensation is not required. A radio equipment 10 tunes an oscillator with a 1st tuning value to send ...
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JPH1093344A |
To enhance the temperature compensation accuracy with respect to the temperature compensation data write method for the oscillator. In the oscillator provided with a quartz oscillator 24, a varactor diode connecting to quartz oscillator ...
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JP2738319B2 |
PURPOSE: To perform accurate temperature compenstation even for the rapid change of an ambient temperature and to prevent the degradation of frequency stability. CONSTITUTION: A frequency divider 2, the frequency divider 3 and a highly a...
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JP2735092B2 |
PURPOSE: To obtain a highly stable self-running frequency by applying temperature compensation to the self-running frequency control for a PLL circuit. CONSTITUTION: When an input signal 11 is interrupted, an output of an interrupt detec...
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JP2729815B2 |
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JPH1065527A |
To minimize the phase fluctuation of a timing signal outputted from the phase locked loop oscillation circuit. A wavelet filter 40A is used to apply wavelet transformation to a phase fluctuation of an input signal 10 to a phase locked lo...
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JPH1056329A |
To obtain an oscillator by which a wide variable frequency band width and sufficient frequency precision are simultaneously obtained and also which is easily controlled by providing plural input terminals for inputting the control signal...
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JPH1032480A |
To provide a proximity sensor provided with stable detection characteristics. A driving current setting circuit 2 for supplying a driving current to an oscillation circuit 1 provided with a resonance circuit is provided with a temperatur...
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JPH1028013A |
To perform an operation without lowering the gain even in a wide band or plural bands by adding a load impedance to an antenna element and discretely or continuously controlling the value. A load impedance switch circuit 200 for switchin...
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JPH10501108A |
PCT No. PCT/FI95/00320 Sec. 371 Date Dec. 6, 1996 Sec. 102(e) Date Dec. 6, 1996 PCT Filed Jun. 5, 1995 PCT Pub. No. WO95/34133 PCT Pub. Date Dec. 14, 1995A phase locked loop (PLL) includes a phase comparator (12), a charge pump (13), a l...
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JPH104318A |
To provide a crystal oscillator which has sufficiently high accuracy and operates at a low voltage level by outputting the varicap control voltage decided by the temperature of an oscillation part to a varicap as a varicap control voltag...
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JPH09321621A |
To switch a frequency of an output signal without losing the frequency stability. A controller 18 generates a digital control signal Dc based on a power supply voltage and an object frequency and the temperature of a voltage controlled o...
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JP2556257Y2 |
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JPH09307355A |
To provide an oscillator oscillating precisely in spite of being cheap and easy to set a temperature characteristic. A thermistor 1 measures environmental temperature and a temperature correcting means 2 corrects measuring error dependin...
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JP2679179B2 |
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JP2676081B2 |
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JP2666709B2 |
An oscillating apparatus includes a quartz crystal oscillator for outputting a reference frequency signal, a phase-locked loop for oscillating a desired frequency signal on the basis of an output from the quartz crystal oscillator, a uni...
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JP2663991B2 |
PCT No. PCT/EP89/00590 Sec. 371 Date Feb. 12, 1990 Sec. 102(e) Date Feb. 12, 1990 PCT Filed May 26, 1989 PCT Pub. No. WO89/12932 PCT Pub. Date Dec. 18, 1989.A phase control circuit in which a first phase comparator compares an input freq...
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JP2657498B2 |
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JPH09508762A |
A voltage controlled oscillator (VCO) provides an output signal with an output frequency that varies only minimally for any given input control voltage despite variations in the manufacturing process, temperature and supply voltage. The ...
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JP2648080B2 |
PURPOSE: To suppress the sudden change of the frequency of VCO and to pre vent the instantaneous increase of normal phase error by operating compensation data for the change of the ambient temperature of VCO as target voltage and operati...
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JP2624585B2 |
A low current substrate bias generator for regulating the voltage of a substrate layer of an integrated circuit includes a sense circuit having an input for sensing the voltage of the substrate and an output that is coupled to an inverte...
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JP2621331B2 |
There is disclosed herein a millimeter-wave/submillimeter-wave oscillator comprising a mirror and a diffraction grating so as to form a Fabry-Perot type resonator. The mirror, being a concave mirror or a plane mirror, and the diffraction...
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JP2621058B2 |
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JPH09148927A |
To provide the AFC(automatic frequency control) circuit which is used in the reception equipment of a portable telephone set or the like and has a low power consumption, a high stability, and the low cost. The temperature is detected by ...
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JP2616701B2 |
PURPOSE: To shorten control at the time of starting a system since the time until the coincidence of frequency accuracy at the time of starting the system is long in the case of letting all clock supply devices inside a network be coinci...
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JPH09130143A |
To secure the satisfactory stability of a crystal oscillator for a long period with no occurrence of minute jumps of oscillation frequency by setting the base current of an oscillation transistor TR in an area where the oscillation frequ...
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JPH09113205A |
To realize significant cost reduction by simplifying device configuration. A resonance circuit consists of a capacitor 2, a coil element 4 and a primary side coil 31 of a transformer 3. The connection between the resonance circuit and an...
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JPH09116336A |
To extract the data in a short time by preparing the opening parts to a shielding case which covers a control element and an oscillation element over a substrate. An oscillation element 2 and a control element 3 are mounted on a ceramic ...
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JP2604600B2 |
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JPH0969773A |
To suppress the occurrence of residual jitter by controlling a phase shift oscillator in accordance with the temperature variance to suppress the frequency change caused by the temperature variance. This circuit consists of a phase shift...
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JPH0955624A |
To facilitate circuit integration by adding a temperature detection value and an approximated ternary curve output value so as to generate a control signal of a voltage controlled crystal oscillator thereby smoothly changing an input vol...
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JP2579915B2 |
This invention relates to a thermostatted oscillator comprising an assembly support constituted by a printed circuit provided with an opening, on the edge of which is fixed, at a reduced number of points, an electrically insulating secon...
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JPH0918234A |
To compensate the frequency/temperature characteristic and to facilitate the adjustment after production by supplying the applied power voltage to an oscillation circuit to change the frequency/temperature characteristic in response to t...
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JPH098551A |
PURPOSE: To set a frequency change caused by a temperature change or lapse of aging time within a permissible range in the highly stabilized oscillation circuit used for a frequency reference of a measurement device or a broadcast equipm...
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JP2570124B2 |
PURPOSE: To obtain a stable AFC operation by providing a temperature compensation circuit absorbing a fluctuation of an AFC control voltage accompanied with a temperature fluctuation to an AFC voltage control circuit comparing an AFC vol...
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JP2520928Y2 |
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JPH08330947A |
PURPOSE: To provide a display control circuit which compensates the temperature dependency of a voltage control oscillator and can acquire a stable sampling signal. CONSTITUTION: A display control circuit 20 is provided with a PLL circui...
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JPH08328688A |
PURPOSE: To avoid destruction of a file under processing even when a temperature rise in the processing unit cannot be decreased regardless of decreased frequency of the system block. CONSTITUTION: Upon the receipt of a detection signal ...
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JPH08298456A |
PURPOSE: To obtain the frequency control circuit configured simply at a low cost in which a stable frequency signal is obtained even in the case of momentary interruption of the circuit power supply. CONSTITUTION: When a momentary interr...
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JPH08288741A |
PURPOSE: To reduce the number of memories, to simplify the configuration of a control circuit and to reduce the size of a crystal oscillator and its power consumption by storing data required for the setting of control voltage in a memor...
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JPH08274541A |
PURPOSE: To provide high-accuracy frequency stability over a wide temperature range by changing the frequency of an oscillator using a first surface acoustic wave(SAW) element into a voltage, and controlling the oscillation frequency of ...
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JPH08265043A |
To provide a frequency generation device which can be used for a part of a digital system used in a radio communication call system such as a clock for a call device, which can stand a long use with less influence by the temperature. The...
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JPH08509346A |
Apparatus and methods for improving timing recovery of a system clock by causing its frequency to be within a specified tolerance range during a timing recovery acquisition period for the system clock. The apparatus includes a voltage co...
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JPH08237081A |
To output a very stable frequency throughout the range of conventional operation parameters. This oscillator 100 has a current generator 50 and a hysteresis circuit 74. This hysteresis circuit has an NMOS 94 and a PMOS 82 connected to cu...
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JPH08237113A |
PURPOSE: To obtain the temperature compensated oscillator in which tempera ture is compensated with high accuracy and the frequency stability is enhanced. CONSTITUTION: This oscillator is provided with an oscillation circuit 1 that conve...
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JP2518148B2 |
PURPOSE: To provide a clock subordinate synchronization method providing a stable output clock signal regardless of phase fluctuation of an input clock signal. CONSTITUTION: A phase comparator 1 compares an input clock signal with a freq...
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