摘要:
An oscillator operated with an external power source or an external save power source is provided comprising: a clock signal generation unit for generating and outputting a clock signal; a power-on detection unit for detecting the power-on of the external power source; a power-off detection unit for detecting the power-off of the external power source; a running time count unit for counting the running time from a time of the power-on detection signal being input to a time of the power-off detection signal being input; storage means for storing accumulated running time up to a power-on time of the external power source; and a control unit for reading the running time at the time of the power-off detection signal being input, reading the accumulated running time from the storage means, adding the running time to the accumulated running time, and storing the addition result as a new accumulated running time in the storage means.
摘要:
A piezoelectric oscillator and an electronic device are provided that can stabilize start characteristics by reducing power noise during a power supply process and which can improve oscillation stability. Included are an oscillation stage so as to generate oscillation pulses by exciting a piezoelectric resonator, an output stage to amplify and then output oscillation pulses, and a start delaying circuit so as to start the output stage later than the oscillation stage only by a selected delay time from a plurality of delay times.
摘要:
An oscillator operated with an external power source or an external save power source is provided comprising: a clock signal generation unit for generating and outputting a clock signal; a power-on detection unit for detecting the power-on of the external power source; a power-off detection unit for detecting the power-off of the external power source; a running time count unit for counting the running time from a time of the power-on detection signal being input to a time of the power-off detection signal being input; storage means for storing accumulated running time up to a power-on time of the external power source; and a control unit for reading the running time at the time of the power-off detection signal being input, reading the accumulated running time from the storage means, adding the running time to the accumulated running time, and storing the addition result as a new accumulated running time in the storage means.
摘要:
An oscillator 10 with a noise reduction function has a memory 80 that memorizes modulation data DM for performing the spread spectrum modulation input from an output terminal fout, a modulation signal output circuit 60 that generates a modulation signal SM from the modulation data DM memorized in the memory 80, and a mixer 53 that overlays the modulation signal SM on the control voltage VC of a voltage control oscillator (VCO) 54 of a PLL circuit 50, and it becomes possible to output a spread spectrum modulated output signal CLv under a specification desired by a user by memorizing in the memory 80 the modulation data DM that corresponds to the spread spectrum modulation the user tries to set.
摘要:
This invention provides a voltage controlled oscillator that improves the linearity of frequency variable characteristics and increases the range of frequency that can be varied by a control voltage. A resistor circuit is connected between a piezoelectric resonator X and an oscillator circuit. The resistor circuit includes a plurality of oscillation-amplitude adjusting resistors Rs1 to Rsn and corresponding switches SW1 to SWn. The resistor circuit adjusts the amplitude of oscillation. When a control voltage Vc applied to a varactor Cv is at a low potential, clipping by a forward voltage of the varactor Cv is suppressed, and the frequency is linearly changed by the control voltage Vc within a range of a low potential to a high potential.
摘要:
A projector includes: an illuminator that outputs illumination light; a light modulator including a liquid crystal panel and a structural birefringent polarization separation element having a polarization separation surface inclined away from a central axis of the illumination light, the light modulator modulating the illumination light from the illuminator; and a projection system that projects the light modulated by the light modulator, wherein the illumination light outputted from the illuminator has an angular distribution in a first direction, which is perpendicular to the central axis of the illumination light, smaller than the angular distribution in a second direction, which is perpendicular to the first direction and the central axis of the illumination light, and the polarization separation surface of the structural birefringent polarization separation element has a structure that is not periodic along the first direction but is periodic along the second direction.
摘要:
An image display apparatus comprise: a light source section; a light modulator that modulates light delivered from the light source section to display an image; a light level control section that adjusts the amount of light delivered from the light source section to the light modulator; and a display control section that updates the image displayed on the light modulator during a first period and a second period alternately switched therebetween. The display control section updated in the first period to a first image and a black image in this order and updates in the second period to a second image and the black image in this order. The light level control section sets the amount of light delivered from the light source section to be greater than that in other periods during a predetermined switching period including a point to switch between the first period and the second period.
摘要:
It is possible to achieve the protection of software with reduced overhead. For example, a memory for storing an encrypted code prepared in advance and a decryptor module for decrypting the code are provided. The decryptor module includes, for example, a three-stage pipeline and a selector for selecting one output from the outputs of each stage of the pipeline. When a branch instruction is issued and subsequent inputs of the pipeline are in the order of CD′1, CD′2, . . . , the decryptor module outputs a first decrypted code by performing a one-stage pipeline process to CD′1. Next, the decryptor module outputs a second decrypted code by performing a two-stage pipeline process to CD′2, and the decryptor module outputs a third decrypted code by performing a three-stage pipeline process to CD′3 (and subsequent codes). Therefore, in particular, the overhead to CD′1 can be reduced.
摘要:
A projector capable of increasing in the contrast by reducing the amount of leakage of light due to reflection of light on the surface of a retarder is to be provided. A retarder is placed and tilted in a direction so that the following conditional expression is satisfied, denoting a distance between a point A where the normal drawn from the center of a substrate plane of the retarder and a substrate plane of a polarizing beam splitter intersect and a point C where the substrate plane of the polarizing beam splitter and the optical axis of a projection system as AC, and a distance between a point B where the substrate plane of the polarizing beam splitter and the system optical axis intersect and the point C as BC: AC>BC.
摘要:
An optical apparatus includes an optical element disposed on an optical path along which the light flux emitted from a light source travels, and a polarizing element disposed on the light flux emitting-side of the optical element. The polarizing element includes a first prism having a light flux incident-side end surface on which the light flux having emitted from the optical element is incident and an emitting-side inclined surface inclined to the light flux incident-side end surface, and a polarizing element body provided on the emitting-side inclined surface, the polarizing element body transmitting first linearly polarized light out of the light flux having passed through the first prism and reflecting second linearly polarized light polarized perpendicular to the first linearly polarized light toward the first prism. The optical element is integrated with the polarizing element with an interposed adhesive layer formed on the light flux incident-side end surface. The refractive index n0 of the adhesive layer is set to satisfy the following equation: 1≦n1/n0×sin [2φ−arcsin {n0/n1×sin(θ−φ)}−2φ] where n1 represents the refractive index of the first prism, θ represents the angle between the optical axis of the light flux emitted from the light source and the light flux incident on the light flux incident-side end surface, φ represents the angle between a plane orthogonal to the optical axis and the light flux incident-side end surface, and φ represents the angle between the orthogonal plane and the emitting-side inclined surface.