Patent application number | Description | Published |
20100026405 | Phase-locked loop circuit, recording-and-reproducing apparatus, and electronic apparatus - A phase-locked loop circuit includes a phase detection unit which detects phase information of an input signal, a loop filter unit including a series circuit of a resistor and a capacitor, first and second pulse-current output units which supply pulse currents corresponding to the phase information output to one and the other of the resistor and the capacitor, and an oscillating unit capable of varying an oscillation frequency in accordance with a component obtained by combining a voltage generated at both ends of the one of the resistor and the capacitor on the basis of the pulse current supplied from the output terminal of the first pulse-current output unit and a voltage generated at both ends of the other one of the resistor and the capacitor on the basis of the pulse current supplied from the output terminal of the second pulse-current output unit. | 02-04-2010 |
20100026406 | Phase-locked loop circuit, recording-and-reproducing apparatus, and electronic appratus - A phase-locked loop circuit includes a phase detection unit, a loop filter unit including a series circuit of a resistor and a capacitor, first and second pulse-current output units which supply differential and single-end pulse currents corresponding to phase information to the resistor and capacitor, an oscillating unit which varies an oscillation frequency in accordance with a voltage generated at the resistor and capacitor, and a calibration unit which obtains information of an oscillation gain in actual operation and corrects an operation of the oscillating unit on the basis of a difference between the oscillation gain in actual operation and a target oscillation gain. The oscillation gain in actual operation represents a characteristic of oscillation frequency versus input signal of the oscillating unit and is obtained using predetermined oscillation control signals on the basis of a difference between actual oscillation frequencies under the oscillation control signals. | 02-04-2010 |
20110007615 | Oscillation circuit and recording apparatus - An oscillation circuit includes: n ring oscillators each formed from m delay elements connected annularly, m being an integer equal to or greater than 2, n being an integer equal to or greater than 2; and a phase coupled ring. | 01-13-2011 |
20120040627 | Phase-locked circuit and radio communicating device - Disclosed herein is a phase-locked circuit including: a phase-locked section including a voltage controlled oscillator having a capacitance bank and changing oscillation frequency according to voltage information, the phase-locked section phase-locking an oscillating signal of the voltage controlled oscillator to a reference signal; and a calibration section having a voltage correcting function for supplying an appropriate calibration voltage to the voltage controlled oscillator in performing frequency calibration for the voltage controlled oscillator; the calibration section including a counter circuit, a first storage circuit and a second storage circuit, a comparator circuit, a control circuit, a voltage generating circuit, and a processing circuit. | 02-16-2012 |
20140286470 | PHASE LOCKED LOOP AND CLOCK AND DATA RECOVERY CIRCUIT - A clock and data recovery circuit includes: a first current source configured to supply a charge current through a first signal line; a second current source configured to supply a discharge current through a second signal line; a loop filter configured to convert the charge current into a first voltage signal and output the first voltage signal through a third signal line, and to convert the discharge current into a second voltage signal and output the second voltage signal through a fourth signal line; a voltage control oscillator configured to be controlled in frequency; and a phase detector configured to receive a data signal from outside and receive a clock signal from the voltage control oscillator, and to supply a control signal to each of the first current source and the second current source, and generate a recovery clock signal and a recovery data signal. | 09-25-2014 |
20150256185 | CIRCUIT, VOLTAGE CONTROL OSCILLATOR, AND OSCILLATION FREQUENCY CONTROL SYSTEM - A circuit includes first and second capacitances arranged on a first path that connects first and second terminals; a first switch arranged between the first capacitance and the second capacitance; a second switch arranged on a second path that connects a reference voltage section and a first node formed between the first capacitance and the first switch; a third switch arranged on a third path that connects the section and a second node formed between the second capacitance and the first switch; a first resistance arranged on a fourth path that connects the first node and a third node formed between the first terminal and the first capacitance; a second resistance arranged on a fifth path that connects the second node and a fourth node formed between the second terminal and the second capacitance; a fourth switch on the fourth path; and a fifth switch on the fifth path. | 09-10-2015 |
Patent application number | Description | Published |
20080231395 | ELECTROMAGNETIC RELAY - An electromagnetic relay is structured such that a base includes a movable contact piece and a fixed contact piece. A movable contact point included in the movable contact piece is connected to and disconnected from a fixed contact point included in the fixed contact piece by operating the movable contact piece via a card. At least any one of the base and the card includes a guide portion for guiding the card in a freely reciprocating manner with respect to the base. The card includes a guide protruding portion and a pressing portion for pressing the movable contact piece to elastically deform the movable contact piece. The movable contact piece includes a guide portion in a side portion of the movable contact point. The guide portion includes a guide hole into which the guide protruding portion is inserted, a pressure receiving portion positioned at an opposite side to the movable contact point with respect to the guide hole and pressed by the pressing portion, and a reinforcing portion for preventing plastic deformation at a time of being pressed by the pressing portion. The guide hole maintains a non-contact state of the card during the reciprocating motion. | 09-25-2008 |
20080231396 | ELECTROMAGNETIC RELAY - An electromagnetic relay is formed by winding a coil around an iron core via a spool, and is structured such that a movable contact piece is driven to open and close a contact point by magnetizing and demagnetizing an electromagnet block arranged in a base, causing a movable iron piece to be attracted and repelled to and from a magnetic pole portion of the iron core to rotate the movable iron piece, and causing a card to reciprocate. The card is guided by the base in a freely reciprocating manner, and includes a runout portion in which one collar portion of the spool of the electromagnet block arranged in the base is movable and a guide portion for holding one end portion of the movable iron piece. The spool includes a cylindrical trunk portion around which the coil is wound and collar portions formed respectively on both ends of the trunk portion, one of the collar portions including a step portion for avoiding interference with an adjacent position to the runout portion of the guide portion when the card reciprocates. | 09-25-2008 |
20080231398 | ELECTROMAGNETIC RELAY - An electromagnetic relay includes a base including a fixed contact piece and a movable contact piece. The movable contact piece includes a movable contact point that is moved to contact and be separated from the fixed contact piece at a fixed contact point by driving the movable contact piece. The movable contact piece includes a terminal portion held in the base and partially protruding from the base, a first contact piece portion connected to the terminal portion and protruding from the base at a different position from the terminal portion, a bent portion connected to the first contact piece portion and changing a protruding direction gradually, and a second contact piece portion connected to the bent portion, extending in a different direction from a base portion, and provided with the movable contact point. | 09-25-2008 |