Abstract: A motor control system and method for detecting an obstruction for an automatic window of a vehicle include a window frame having an opening defined therebetween and a window pane disposed within the opening of the window frame. The motor control system includes a plurality of transmitters that emit an electromagnetic energy signal and a plurality of sensors which detect the signals in the opening of the window frame. A control module in communication with the plurality of transmitters and sensors processes the detected signals and transmits a signal to a drive motor to stop the upward travel of a window based on the detection of an obstruction between the window frame and the window pane.

Abstract: A pulse generating circuit for motor rotation of a direct current motor which is capable of pulse generation following the variation of the motor rotation condition and of stable ripple pulse generation. The pulse generating circuit for motor rotation includes a filter for varying a cut-off frequency fc by the signal from outside and for removing the noise based on the input signal from the direct current motor, a pulse forming circuit for forming the ripple pulse in accordance with the motor rotation of the direct current motor based on the output from the filter, a clock generating circuit for varying the cut-off frequency fc of the filter by providing the clock signal fCLK which is generated based on the rotational condition signal of the ripple pulse and the direct current motor to the filter, and a pulse correction circuit for generating the corrected ripple pulse when the frequency ratio between the ripple pulse and the clock signal fCLK is deviated.

Abstract: The present invention is a control method and numerical control for the vibration-reduced acceleration of a movable machine element of a numerically controlled industrial processing machine, in which a path of movement of the machine or machine element is broken down into directly successive interpolatable movement sections In the interpolation, resultant acceleration profiles which lie in a range close to a critical natural frequency of the machine or machine element are carried out with a reduced acceleration. By this method, intervention is made only in critical ranges of the acceleration profile, uncritical ranges remain uninfluenced, as a result of which drastic time losses during positioning can be avoided.

Abstract: A conventional synchronous motor controlling method estimates the speed and performs a vector control, so that the gain of a speed control system has to be adjusted according to the inertia of a load connected to the motor shaft, and computation is also relatively complicated.

Abstract: A current control method controls current for drive systems of multi-phase brushless motors, in particular at phase switching, wherein the motor coils coupled to a common node are driven by applying a respective drive voltage to the free end of each coil via corresponding power stages. The method comprises switching the current flow from one phase to the next in the direction of rotation of the motor at the phase switch, thereby forcing the unaffected one of said coils by the phase switch into a state of high impedance. Advantageously, the decreasing rate of the current in the coil unaffected by the phase switch can be twice as high as the decreasing rate of the current in the phase being switched from.

Abstract: A protective device (3) for a hermetic type electromotively driven compressor (1a) includes a protector assembly (30) having a housing (32) with an electric current fuse (34) which detects a predetermined over-current. The housing (32) comprises an electrically insulating skirt member (31) formed so as to block a conductive part on the side facing an external connection terminal. By forming the electrically insulating skirt member (31) of housing (32) for a hermetic type electromotively driven compressor, insulation distance between a conductive part such as the electric current fuse (34) and an external conductive part such as a metal wall part (21) is set to be 9.5 mm or more.

Abstract: The present invention provides a space-saving and low-cost emergency power system, which can be installed on a narrow place having limited space and employs a battery that is long in service life and low in frequency of replacement. This emergency power system comprises a circuit having a DC load, a rectifier, and a battery, which are electrically connected to one another. This circuit is adapted so that normally, DC power is supplied from the rectifier to the DC load, and the battery is charged, and that in an emergency, such as a power failure, in which an outage of the rectifier occurs, electric power is automatically supplied from the battery to the DC load. In this system, a sodium sulfur battery is employed as the battery.

Abstract: A compact, economical and fast battery charger for Ni-CAD and Ni-MH batteries turns a current source into a controlled voltage source which keys off a signal representative of the voltage level of the battery during the charging process and turns the current source ON and OFF to assure that the battery during the charging process does not exceed a given voltage level. The apparatus includes in par a ballasting resistor in series with the battery to compensate for the low resistance of the battery and an open collector voltage comparator which establishes high and low voltage set points for turning the current source ON and OFF at the appropriate times. The method and apparatus includes a visual display responsive to a signal which produces on the visual display an indication of the state of charge of the battery during a charging cycle. A circuit board has a long U-shaped trace extending around a notch in the board, on each side of each is mounted on battery.

Abstract: A method and apparatus for charging a rechargeable battery with a current from a controllable current source. In order to adjust the rated current of the controllable current source, at least one operating parameter of the rechargeable battery, such as the rechargeable battery voltage which is produced as a consequence of a charging process, is detected. A pulsed control signal with a duty ratio which corresponds to the desired rated current is produced as a function of the operating parameter. The duty ratio of the pulsed control signal is evaluated, and the rated current of the current source is adjusted as a function of the duty ratio of the pulsed control signal.

Abstract: A temperature rise pattern is retrieved from charging time based on the difference between a battery temperature at the beginning of battery charge and a target temperature value which a battery is intended to reach (in S116). The battery is charged while adjusting a current value so that a temperature rise value becomes the temperature rise pattern (in S118 and S120). Thus, by optimizing the temperature rise pattern, it is possible to charge the battery so that the temperature at the time of the completion of battery charge becomes the target temperature value (the lowest temperature value).

Abstract: An integrated system for comprehensive control of an electric power generation system utilizes state machine control having particularly defined control states and permitted control state transitions. In this way, accurate, dependable and safe control of the electric power generation system is provided. Several of these control states may be utilized in conjunction with a utility outage ride-through technique that compensates for a utility outage by predictably controlling the system to bring the system off-line and to bring the system back on-line when the utility returns. Furthermore, a line synchronization technique synchronizes the generated power with the power on the grid when coming back on-line. The line synchronization technique limits the rate of synchronization to permit undesired transient voltages.

Abstract: Rate-of-change switches (63 and 154) each include a mechanical-to-electrical transducer (38A, 38B, or 39) and a rate-of-change control device (22, 110, 120, 130, 132, 140, or 146). The rate-of-change control devices (22, 110, 120, 130, 132, 140, and 146) each include a differentiator (40A, 40B, 112, or 156), and a discriminator (42, 114, 134, 160, or 162). The rate-of-change switches (63 and 154) perform at least one switching function when an output from the differentiator (40A, 40B, 112, or 156) or a second differentiator (158) exceeds an allowable magnitude. The rate-of-change switches (63 and 154) may be used to control a timed-opportunity switch (26 or 172), a conveyance, such as a wheelchair (12), and such functions as extending and retracting leg supports, and/or an environmental control unit (14 or 174). The rate-of-change switches (63 or 154) may be attached to a body member (18, 64, or 67) and be body-member actuated.

Abstract: A circuit configuration is provided for controlling the transmitting power of a battery-operated transceiver. A high transmitting power of a mobile transceiver generates a high voltage drop across an internal impedance of the battery which can lead to the device switching off. A reduction in the transmitting power in dependence on the battery voltage is therefore proposed. The battery voltage is thus compared with a reference voltage and a signal representing a nominal transmitting power is correspondingly corrected. The circuit can be integrated in a simple manner with analog components in an IC.

Abstract: The performance of the main regulatory transistor of an on-chip voltage regulator circuit is enhanced when the main transistor is appropriately biased during start up. In an example embodiment, a voltage regulator circuit includes a thin gate oxide transistor as the main regulatory transistor and an operational amplifier that is referenced to a midlevel operating voltage. During start-up, the potential voltage difference is large enough to necessitate the disconnection of the main transistor from the operational amplifier. A voltage divider ladder circuit is used to maintain the gate voltage of the main transistor at the midlevel voltage while a smaller thick gate oxide transistor is used to maintain loop stability and to withstand voltage transients.

Abstract: A switching power supply which generates AC power, as opposed to DC power. A transistor opens and closes to thereby generate charge-discharge cycles through an inductor-resistor combination. Each charging current is compared with a reference waveform which changes slowly over time, compared with the opening and closing of the transistor. When each charging current exceeds the then-current value of the waveform, the transistor is opened, inducing a discharge cycle. This operation produces an output power waveform which is a replica of the reference waveform.

Abstract: In a power supply device to which a DC voltage can be fed and which outputs a stabilized voltage for operating an electronic circuit in a motor vehicle, a step-up converter is arranged between an input for the operating voltage and an output of a voltage regulator, which step-up converter is activated when a battery voltage is below a predefined threshold voltage, and raises the battery voltage to at least the threshold value.

Abstract: Current source comprising a MOS transistor (T1) having a first terminal (D) connected to a high voltage input (HV), a second terminal (S) providing an output current (Iout) to a current output terminal (Q), and a gate, the current source further including a bias unit (T2) connected to the high voltage input (HV) for generating a small bias current for the gate (G), the gate (G) further being connected to an output (Q1) of a voltage comparator (A1) for comparing a sensed voltage (Vsense) caused by the output current (Iout) over a voltage sensor means (Rsense) with a reference voltage and providing at said comparator output (Q1) a regulation voltage for the gate (G) based on the difference between the sensed voltage and the reference voltage, wherein the bias unit (T2) includes a transistor (T2) having a gate electrode (g) which is coupled to one of the nodes of the voltage sensor (Rsense).

Abstract: A system and method of determining locations of lightning strikes has been described. The system includes multiple receivers located around an area of interest, such as a space center or airport. Each receiver monitors both sound and electric fields. The detection of an electric field pulse and a sound wave are used to calculate an area around each receiver in which the lighting is detected. A processor is coupled to the receivers to accurately determine the location of the lighting strike. The processor can manipulate the receiver data to compensate for environmental variables such as wind, temperature, and humidity. Further, each receiver processor can discriminate between distant and local lightning strikes.

Abstract: A method for simulating noise in a digital circuit allows a quick simulation using an ordinary personal computer installed with reasonably-priced software. When the program is activated, a screen appears on a display to permit settings to be inputted to specify a circuit to be simulated. The input screen has an input signal specifying section, a transmitter IC specifying section, a filter specifying section, a transmission line specifying section, and a receiver IC specifying section, whereby the transfer function of the simulated circuit is obtained. An input signal is Fourier-expanded, and a frequency-domain output spectrum is obtained from the transfer function and the Fourier-expanded input signal. Then, the frequency-domain output spectrum is inversely Fourier-expanded to obtain a time-domain output waveform.

Abstract: A frequency monitor includes an edge detector which produces a pulse for each rising or falling edge of an error signal. The error signal itself has a frequency that is responsive to a difference between frequencies of two input signals. A switched capacitor circuit has an effective average resistance that depends on the rate or frequency of the edge detector output pulses. A capacitor holds a charge that depends on the effective average resistance of the resistive circuit. Finally, comparator produces an output based on the charge held by the capacitor. The comparator output indicates whether the difference between the two input signal frequencies is less than some predetermined amount. A selector, responsive to the comparator, selects from a data phase detector circuit and a frequency acquisition circuit to control an oscillator. The oscillator produces a clock signal at a sampling frequency, which is used by the detector circuit to receive data.

Abstract: To remove ringing from pulse. A buffer amplifier (30) is inserted in series into a path through which a signal is transmitted. Ringing caused in the output of the buffer amplifier (30) is detected by an L side comparator (31) and an H side comparator (32). When ringing is detected, a current is supplied into the input of the buffer amplifier (30) through an L side current supply circuit (33) or an H side current supply circuit (34). By supplying a current from the L side and H side current supply circuits (33, 34), the overshooting portion due to ringing can be suppressed.

Abstract: A sensor for measuring torque and position of a shaft having an internal torsion bar. The sensor has a torque sensor, located in the housing and connected to the shaft. The torque sensor has a rotor in electrical contact with a first and second resistive track disposed on an opposed disc. A position sensor is located in the housing and is connected to the shaft. The position sensor has a third contactor mounted to the housing in electrical contact with a third resistive track located on the disc. Several electrical terminals are located in the housing and are electrically communicated with the contactors to provide an electrical signal indicative of the torque and position of the shaft to an external electrical circuit. A slip ring is attached between the rotor and the housing. The slip ring has a fourth and fifth contactor in contact with the torque sensor. The slip ring is adapted to electrically connect the torque sensor to the electrical terminals.

Abstract: A rotation angle sensor including a magnet rotatable about an axis, a first and second yokes arranged around said magnet and diametrically opposed to each other, and a Hall effect device disposed between the first and second yokes. The yokes include arcuately curved pole piece portions radially opposed to the magnet and overhang portions extending angularly inwardly from the pole piece portions across the axis of the magnet, respectively. The overhang portions have a generally sector shape and cooperate to define a gap therebetween within which the Hall effect device is disposed. Leakage flux reducing members circumferentially extends between the pole piece portions.

Abstract: A method for testing a thin-film magnetic head with a MR read head element includes a step of applying a low-frequency or DC external magnetic field to the thin-film magnetic head from a stationary magnetic field generation unit, a step of executing a high-frequency amplification of an output from the MR read head element under the application of the external magnetic field to provide a high-frequency amplified signal, a step of deriving only a high-frequency component from the high-frequency amplified signal to provide a high-frequency component signal, and a step of judging whether the thin-film magnetic head occurs a noise or not by using the high-frequency component signal.

Abstract: A non-linear Hall IC 1 includes storing means 4 for storing conversion information for conversing Hall voltage output from a Hall element 2, and non-linear converting means 5 for converting the Hall voltage into an output voltage based on the conversion information stored in the storing means 4. In the non-linear converting means 5, the Hall voltage is converted into the output voltage such that a relation between the magnetic field strength and the output voltage becomes a non-linear relation.

Abstract: A method for determining sources of interference that cause partial discharges in an encapsulated conductor structure of a magnetic resonance apparatus, particularly in a gradient coil. Under the method, a low-frequency high voltage is applied to a conductor, and signals resulting from an adjacent high voltage are measured within a frequency range located in the kHz range, particularly from 40 to 400 kHz. The signals are analyzed in order to determine partial discharges. The conductor is again charged with a low-frequency high voltage and additional signals are measured within a frequency range located in the MHz range, particularly from 10 to 300 MHz. The additional signals are analyzed in order to determine partial discharges.

Abstract: In a method for operating a magnetic resonance tomography system having a shim coil arrangement and a gradient coil arrangement, in which, in order to generate an image dataset of a region of an examination subject to be imaged, at least the region that is to be imaged is borne in an imaging volume of the system, an initial shim adjustment procedure is carried out, a change (if it occurs) in the position of the imaged region in relation to the imaging volume is detected, and a current in the shim coil arrangement is modified dependent on the detected position change.

Abstract: A multiplex voltage measurement apparatus includes: (N+1) voltage detection terminals connected to N serially connected voltage sources; a capacitor which is charged with a voltage value of any of the N voltage sources; a first sample switch for selectively connecting odd-numbered voltage detection terminals among the (N+1) voltage detection terminals to a first terminal of the capacitor; a second sample switch for selectively connecting even-numbered voltage detection terminals among the (N+1) voltage detection terminals to a second terminal of the capacitor; a voltage measurement circuit for measuring the voltage value stored in the capacitor; a third sample switch for connecting the first terminal and the second terminal of the capacitor to the voltage measurement circuit; and a polarity controller for controlling the first and second sample switches such that one of the N voltage sources is selected while the third sample switch is open.

Abstract: A voltage sensing apparatus is provided with an output for a voltage tap point that is useful in representing the voltage on a conductor that passes through the voltage sensing apparatus. The voltage sensing apparatus also performs the function of a separable insulated conductor or the like, e.g. a conventional bushing or bushing insert as utilized in the electrical power distribution field. The voltage sensing apparatus includes a molded body having an embedded capacitance screen that provides the output. The body is molded about the capacitance screen. An arrangement is provided for locating the capacitance screen within the molded body. In a preferred embodiment, the capacitance screen is molded from a conductive plastic preferably formed with an open mesh or screen structure that permits the free flow of molding material.

Abstract: In circuit tester apparatus using one or more carrier elements, each carrier element having one or more first electrical connectors, the combination comprising one or more base sections, one or more second electrical connectors carried by the section or sections and positioned to interfit the one or more first electrical connectors when the element or elements are assembled to the section or sections, at least two of the multiple base sections located for bridging thereof by at least one carrier element. Carrier elements may comprise adapter cards.

Abstract: Motor insulation degradation is determined using circuitry to sense the common mode leakage current from the ground wire cable. In a preferred embodiment of the invention, a small current transformer detects the common mode leakage current flowing in the ground wire cable of the motor controller circuit. A single pole low pass filter generates an average leakage current signal from the sensed current. The average leakage current signal is converted to a PWM signal. A pulse generator receives the PWM signal and generates pulse signals at the rising and falling edges of the PWM signal. A pair of level shifters receive the rising edge and falling edge pulse signals and transpose those signals from a floating high voltage to a voltage referenced to ground. A pulse reconstruction circuit receives the level shifted pulse signals and reconstructs a pulse width modulated signal having a duty cycle which varies with respect to the magnitude of the common mode leakage current.

Abstract: A dual-directional coupler for measuring true RF power apparent at a radiating element. Incident and reflected power are detected by a pair of detectors. The difference between the two detected voltages is amplified by a differential amplifier to generate a voltage proportional to the true transmitted power.

Abstract: A powder detecting capacitance-type sensor having a protection cover disposed inside of the powder tank so as to cover a sensor body. The protection cover is made of porous material to permit compressed air to communicate from an inner surface to an outer surface of the protection cover. The protection cover is made of half-sinter of e.g. polyethylene.

Abstract: A motion sensor device comprises a conductive cap fixed to one layer of a printed circuit board to define a volume half of which is filled with a dielectric liquid. A conductive layer on the opposite side of the printed circuit board forms with the cap a capacitor, the capacitance of which is dependent upon the location of the liquid within the cap. A motion signal is generated in response to a change of capacitance from that presented in any static orientation of the device, so long as the capacitance change exceeds a threshold and occurs within a predetermined interval.

Abstract: The prior art for handling components to be tested is to insert (to load) the components for each of the testing steps in each case individually into the testing device respectively used and to remove them again after each test. This requires very awkward handling of the components and loads the connecting contacts of the components during each testing operation. In addition, it is necessary, for each testing device and for each component, to provide a holder which permits the mechanical and electrical connection between component and testing device. A further disadvantage is to be seen in the fact that components can be interchanged during sorting.

Abstract: An apparatus for measuring internal properties and making thermomechanical modifications on a material surface using a junction of different metallic wires. The junction of different metallic wires, defines as the Peltier tip, is distinguished from a conventional thermocouple by the fact that it works as a point heat source and as a point temperature sensor simultaneously when an electric current flows into the tip. This novel functionality of the Peltier tip offers a way o the thermal characterizations of a material surface with submicron-scale spatial resolution and high sensitivity, while providing high spatial resolution and speed for thermal modifications since both heating and cooling are possible at the Peltier tip.

Abstract: A method for generating signals for input to a vital “AND” gate includes generating a plurality of independent signals for input to the “AND” gate and checking that each of the signals has a frequency and duty cycle within predetermined ranges. Upon a determination that one of the signals exhibits an inactive state or has a frequency or duty cycle outside the predetermined ranges, generation of another of the signals is stopped. This method eliminates a need for physical filters where the input signals are generated independently by computer subsystems.

Abstract: The compare path bandwidth control for high performance automatic test systems provides a standard dual comparator mode with single ended transmission lines for low frequency applications with a capability of receiving a differential signal when using the dual comparators (40), (41) as an effective single comparator for high frequency applications.

Abstract: The invention is a digital driver that enables an output terminal to be in a high-impedance condition for driving data lines, and an inspection circuit that is provided at ends of the data lines opposite to the digital driver. The inspection circuit includes bi-directional switches provided for each of the plurality of respective data lines, and a controller that controls the switching of the switches. By using the inspection circuit provided at the opposite ends of the data lines, inspections of data-line disconnection or digital-driver output can be performed as well as determining whether or not there is a point defect. In addition, since the circuit is designed only for inspection, its size is extremely small, and the circuit can be disposed in a dead space.

Abstract: A semiconductor integrated circuit device includes control circuits FRQCNT, VDDCNT and VBBCNT that generate the optimum clock signal, supply voltage and substrate bias respectively and then supply them to a main circuit LSI. This operation makes it possible to suppress the variations of a CMOS circuit characteristic, thereby improving the circuit performance. Further, the low power consumption is realized without degrading the operating speed of the CMOS circuit or increasing the power consumption of the CMOS circuit.

Abstract: A logic module for a programmable logic device includes shift register circuitry in addition to the conventional programmable memory cells and look-up table decoder or selection control circuitry. In one embodiment the selection control circuitry can access either the memory cells or the various stages of the shift register. The shift register stages, and preferably the master and slave latches of each shift register stage, are accessed in a Gray code order. All of the stages of the shift register are preferably clearable in parallel. The shift registers of two logic modules are preferably cascadable to facilitate providing longer shift registers. Clock circuitry may be provided to facilitate providing two clock signals that are the logical inverse of one another with a common enable signal.

Abstract: A circuit for altering a chip pad signal incorporates a primary driver that is configured to deliver a chip pad signal to an IC package. The circuit also is configured to cooperate with a second signal and a third signal, with the second signal having a voltage higher than the voltage of the first logic high, and the third signal having a voltage lower than the voltage of the first logic low. So configured, the primary driver may selectively deliver a second logic high, which has a voltage higher than the voltage of the first logic high, to the IC package, and may selectively deliver a second logic low, which has a voltage lower than the voltage of the first logic low, to the IC package. Electronic devices, systems and methods also are provided.

Abstract: A semiconductor device capable of preventing malfunctions of instantaneous lighting, and comprises a drive circuit, a drive control circuit, and a power supply circuit. The power supply circuit has a boosting circuit which is provided with a first power supply potential VDD being a ground potential from an external power supply and a second power supply potential VSS, being a potential other than the ground potential, and raises the absolute value of the second power supply potential VSS and charges to the capacitor; and a bias generating circuit generating a potential to be supplied to the drive circuit and drive control circuit based on the output potential of the boosting circuit.

Abstract: A digital circuit is described which has an input for supplying an input signal through a switching element and an activation input by which it can be switched to an activated or deactivated state. The circuit also contains a first output supplying in a non-inverted manner in the activated state the level of the input signal immediately before switching the switching element to a non-conducting state and a second output supplying in an inverted manner the level of the input signal immediately before switching the switching element to the non-conducting state. In the deactivated state, it furnishes a first logical level to both outputs. The circuit also has a logical unit that is connected to both outputs on the input side and to a control connection of the switching element on the output side. The logical unit switches the switching element to a conductive state, when the first logical level is applied on both outputs.

Abstract: To achieve a differential type logic circuit operating at a high speed and with a low voltage, the circuit is composed of a differential push-pull circuit comprising enhancement type NMOSFETs and depletion type NMOSFETs and a CMOS inverter pair circuit comprising inverters, and a threshold voltage of FETs of the CMOS inverter pair circuit is set to a value same as or greater than a threshold voltage of enhancement type FETs of the differential push-pull circuit and smaller than about ½ of supply voltage.

Abstract: An integrated CMOS semiconductor circuit comprises: an internal circuit composed of CMOS transistors including P- and N-channel transistors each having a gate electrode and source/drain regions formed on a semiconductor substrate, the internal circuit functioning in at least two states including an active state in which data is input and output, and a standby state in which a state of the internal circuit is maintained; an external circuit composed of any electrical element and provided with a power source; and a switch portion which is enable to apply, in the standby state in the internal circuit, a reverse bias between the source and the substrate of either one of the P- and N-channel transistors of the internal circuit by the power source of the external circuit.

Abstract: A method and circuit are disclosed for controlling the write head of a magnetic disk storage device. The circuit includes a pull-up device coupled to a terminal of the write head, for selectively providing a current to the write head through the write head terminal. The circuit further includes parallel-connected current sink circuits, each of which is coupled to the write head terminal and selectively activated to draw current from the write head via the write head terminal. A first transistor is connected in series between the pull-up device and the write head terminal and biased to provide a voltage differential between the write head terminal and the pull-up device. A second transistor is connected in series between the write head terminal and the current sink circuits and biased to provide a voltage differential between the write head terminal and the current sink circuits.

Abstract: Disclosed is a variable drive current driver circuit, comprising: a pair of push-pull circuits for driving a load circuit complementarily; a first current source circuit for having a bias current flow into the pair of push-pull circuits; a second current source circuit for having the bias current flow out of the pair of push-pull circuits; and a control circuit for varying both the bias current flowed by the first current source circuit and the bias current flowed by the second current source circuit according to a control signal.

Abstract: The semiconductor integrated circuit has a power-on resetting circuit for activating a reset signal which initializes an internal circuit, for a predetermined period after a power supply is switched on, and then inactivating the reset signal. The inactivation timing of the reset signal is changed by a timing changing circuit. Therefore, the inactivation timing which has deviated due to fluctuations in the manufacturing conditions of the semiconductor integrated circuit can be adjusted to a normal value. This consequently allows reliable initialization of the internal circuit. In general, a power-on resetting circuit utilizes the threshold voltage of transistors to generate the reset signal. Here, the inactivation timing depends on the threshold voltage of the transistors. Changing the inactivation timing corresponding to the threshold voltage of the transistors implemented makes it possible that the timing changing circuit optimally adjusts the inactivation timing of the reset signal.

Abstract: A PLL device includes a programmable frequency-division device 111 that divides the frequency of the output of a voltage-controlled oscillator 112, a reference signal generating means 105 that generates a first reference signal and a second reference signal having different phases, a first comparator 106 that compares the phases of the first reference signal and the output of the programmable frequency-division device 111, a second comparator 110 that compares the phases of the second reference signal and the output of the programmable frequency-division device 111, a detector 118 that detects the locked state, and a control unit 117. With this structure, when the state is not locked, phase comparisons are performed by a plurality of comparators at different timings, so the locking time is shortened because more than one phase comparison is performed in one period of the reference signal.