摘要:
An electroholographic display system (300, 700) includes: a coherent light source (330, 730); a spatial light modulator (SLM) (320, 720) that modulates a coherent collimated light beam; and a processor and driver unit (310, 710) that generates hologram data and applies appropriate voltages to the pixels of the SLM to modulate the coherent collimated light beam with the hologram data and to suppress a zeroth order component of the modulated light beam at an image plane where the holographic image is reproduced. The processor and driver unit suppresses the zeroth order component of the modulated light beam by selecting the voltages to apply to the pixels of the SLM to cause a first group of pixels to provide a phase shift of 180 degrees to first portions of the collimated light beam with respect to portions of the collimated light beam modulated by a second group of pixels.
摘要:
An integrated SOI circuit is provided for implementing high-voltage ultrasound functions of an ultrasound imaging system. The integrated circuit is packaged as an integrated chip. The integrated circuit is composed of silicon-on-insulator (SOI) technology and integrates at least the following high-voltage ultrasound functions: gatedriver, power amplifier, transmit/receive switch. Optionally the integrated chip may contain a low noise amplifier and an analog multiplexer.
摘要:
A method and system communicates payload data over a plurality of low voltage differential signaling (LVDS) channels (50). First device (100) transmits the payload data and synchronization information to the second device (150) over N LVDS channels (50), along with a word clock synchronized to the payload data. The second device generates M LVDS receive clocks from the word clock, each having a same frequency that is P times a frequency of the word clock, and each having a different phase. Each of N LVDS receivers (160) of the second device (150): correlates the synchronization data with a reference word using each of the M LVDS receive clocks to produce a correlation value for each of the M LVDS receive clocks; selects a selected LVDS receive clock producing a greatest correlation value; and receives the payload data for the corresponding LVDS channel (50) using the selected LVDS receive clock.
摘要:
An electroholographic display system (500) includes a coherent light source (130) adapted to produce a coherent, collimated light beam, a spatial light modulator (SLM) (120) adapted to modulate the light beam, an optical unit (350, 450) in an optical path between the SLM (120) and the image plane (580) where a holographic image is projected. The optical unit (350, 450), which may include a pair of convex lenses (460, 470), operates to effectively decrease the pitch (220) of the pixels (210) of the SLM (120). This allows the electroholographic display system (500) to exhibit a desired range of diffraction even when it includes an SLM (120) whose pixel pitch (220) is larger than would otherwise be required for the desired diffraction range.
摘要:
An electroholographic display system (800, 900) for displaying a holographic image, includes a coherent light source (830, 930) producing a coherent, collimated, light beam; a spatial light modulator (SLM) (820, 920) adapted to receive and spatially modulate the coherent, collimated, light beam to produce therefrom a spatially modulated light beam including first portions having a first polarization and second portions having a second polarization orthogonal to the first polarization; and a processor and driver unit (810, 910) adapted to generate hologram data representing a holographic image and to apply appropriate voltages to the pixels of the SLM to cause the SLM to modulate the coherent collimated light beam with the hologram data. The spatially modulated light beam is projected to an image plane to produce the holographic image including the first portions having the first polarization and the second portions having a second polarization orthogonal to the first polarization.
摘要:
A set of class AB output stages are cascaded to provide a class AB device circuit which utilizes relatively small transistors, low power, and virtually eliminates crossover distortion. The input may be powered by a voltage or a current source.
摘要:
An improved method is presented for adding ESD protection to large signal MOS circuits. Each of the ESD and the MOS devices are separately connected off chip to rigid voltage points, thereby eliminating additional capacitive loading of MOS devices. An improved RF MOS amplifier is presented which implements the method of the invention. An ESD device, comprising back to back diodes, is connected to the Vdd and GND nodes off chip, thus insulating the amplifying transistor from any performance degradative interaction with the ESD device due to transient forward biasing. The method and apparatus are easily extended to circuits comprising any number of MOS devices.