摘要:
Disclosed is a delta-sigma modulated fractional-N PLL frequency synthesizer which performs fractional-N by modulating a divider that divides output frequencies from a voltage controlled oscillator. Fractional part data F from a register is forwarded to a second adder. A first adder adds output from a delta-sigma modulator to output therefrom delayed and inverted by a delay inverter to generate an artificially random bit stream averaging zero. The second adder adds fractional part data F to output from the first adder to generate an artificially random data sequence averaging a value of fractional part data. The generated data sequence is forwarded to the delta-sigma modulator. An adder adds integral part data to output from the delta-sigma modulator. Added output is forwarded to the divider.
摘要:
In order to avoid disappearance of output symbols in accompaniment with DC voltage fluctuations occurring at the timing of switching gain in receiving systems for mobile telephones or the like compatible with W-CDMA systems, the present invention provides a variable gain amplifier circuit, a gain control circuit and a mobile communication terminal apparatus, in which a PGA section is comprised of PGAs having different amplification widths continuously arranged in plural stages as in, two coarse adjustment PGAs, a fine adjustment PGA and a coarse adjustment PGA from the input side to the output side; and a gain control circuit has a memory storing a history of gain control with regard to the PGA section and a logic circuit individually controlling gain of each PGA.
摘要:
An interchangeable lens is disclosed which prevents the camera body and interchangeable lens from being damaged even if an attempt is made to erroneously mount therebetween. The interchangeable lens is a second interchangeable lens whose flange back is the same as that of a first interchangeable lens and includes a protruding portion protruding from a mount reference surface. The protruding amount of the protruding portion is set when the second interchangeable lens has a specific phase relationship with a first camera, so that the protruding portion contacts a first wall portion of the first camera, and is set when the second interchangeable lens has a phase relationship with the first camera other than the specific phase relationship and a bayonet lug of the second interchangeable lens contacts a bayonet lug of the first camera, so that the protruding portion is away from the first wall portion.
摘要:
A lens-interchangeable camera includes a focus detector performing focus detection and a controller performing a drive control of a lens based on a defocus amount. The controller finishes focusing operation without driving the lens when the defocus amount is out a range of a first in-focus determination width, and performs the focusing operation when the defocus amount is out a range of the first in-focus determination width. The controller finishes the focusing operation without performing the focus detection again after completing the drive when the defocus amount is out a range of a second in-focus determination width, and performs the focus detection again after completing the drive when the defocus amount is out a range of the second in-focus determination width. The second in-focus determination width is set to be greater than the first in-focus determination width and be greater than or equal to a drive limit value.
摘要:
A lens-interchangeable camera includes a focus detector performing focus detection and a controller performing a drive control of a lens based on a defocus amount. The controller finishes focusing operation without driving the lens when the defocus amount is out a range of a first in-focus determination width, and performs the focusing operation when the defocus amount is out a range of the first in-focus determination width. The controller finishes the focusing operation without performing the focus detection again after completing the drive when the defocus amount is out a range of a second in-focus determination width, and performs the focus detection again after completing the drive when the defocus amount is out a range of the second in-focus determination width. The second in-focus determination width is set to be greater than the first in-focus determination width and be greater than or equal to a drive limit value.
摘要:
A computer-readable recording medium storing a verification support program is provided. The computer-readable recording medium storing a service provider program that causes a computer to execute: providing a service through acceptance of a service request; establishing a process-to-process communications by waiting for a process to be a destination of the service; stopping provision of the service corresponding to the service request accepted by the providing after the process-to-process communications is established; transmitting, while the provision of the service is being stopped, information for use by the providing to provide the service, to the process by the process-to-process communications; and ending, after the information is completely transmitted by the transmitting, the acceptance of the service request by the providing.
摘要:
Provided is a lens apparatus having a first holding member that holds a first lens unit and a second holding member that holds the first holding member, in which the first and second holding members are engaged with each other so as to be capable of relative movement by means of a plurality of engagement portions provided circumferentially at unequal intervals including a first interval and a second interval larger than the first interval, and in which there is provided, in a portion between the engagement portions arranged at the second interval in at least one of the first and second holding members, an abutment portion radially abutting the other holding member.
摘要:
An interchangeable lens (second interchangeable lens) is disclosed which allows a protruding amount from a mount reference surface of the interchangeable lens to be increased. The second interchangeable lens has a protruding portion protruding from a mount reference surface toward an image plane, has a larger protruding amount than the first interchangeable lens and has the same flange back as the first interchangeable lens. The first camera prevents mounting of the second interchangeable lens by the protruding portion of the second interchangeable lens contacting the first wall portion. The second camera includes a second wall portion provided at a position retreated from the protruding portion. The second camera includes a rotatable mirror member, and the rotation center of the mirror member is positioned on the opposite side of a finder optical system with respect to a plane including an in-plane direction of the mirror member.
摘要:
A lens barrel or an optical apparatus comprises a lens unit arranged to be movable in an optical axis direction, a plurality of shafts which hold a stop arranged to block undesirable light and which extend in the optical axis direction, and a support member which supports the plurality of shafts while allowing the plurality of shafts to be moved in the optical axis direction, wherein the plurality of shafts are moved by being pushed by the lens unit, thereby moving the stop.
摘要:
A motor has at least a vibration rod parallel to the axis of a rotor, in which the vibration rod causes a rotary motion in the rotor. The motor is free from the annular stator showing a large attenuation of vibration and is not associated with the stator support. The motor is also provided with a higher efficiency of energy utilization in comparison with a conventional ultrasonic motor, and is free from the stopping or irregular rotation of the rotor. The vibration rod for rotating the rotor requires a smaller space in comparison with the annular stator in the conventional ultrasonic motor.