摘要:
A burst mode digital data receiver automatically adjusts its logic reference voltage to be equal to one-half of the sum of the minimum and maximum excursions of a received data signal. The receiver includes a differential amplifier circuit which has a first input for receiving the data signal and a second input connected to a voltage reference circuit. The voltage reference circuit is responsive to an output signal from the amplifier circuit to produce the required logic reference voltage at the second input to the amplifier circuit by generating a feedback signal which causes the amplifier circuit to have a first gain value during the absence of the data signal and while the data signal is less than its peak amplitude and a second gain value approximately twice the first gain value for a predetermined time after the peak amplitude of the data signal is reached.
摘要:
A digital burst-mode packet data receiver receives high-speed burst-mode packet data signals superimposed on a lower frequency data signal. The receiver includes a first detector for detecting the received high-speed burst-mode packet data which is reset during the time period between consecutive bursts of the high-speed packet data signal. A second detector detects the lower frequency data signal during a predetermined portion of the time period between consecutive bursts of the high-speed packet data.
摘要:
A dc-coupled packet mode digital data receiver, for use with an optical bus uses peak detectors to adaptively establish an instantaneous logic threshold at the beginning of a data burst. A dc compensator, responsive to outputs of the peak detectors, shunts dc or low frequency currents, corresponding to "dark level" optical signals, from the input of the receiver.
摘要:
A dc-coupled packet mode digital data receiver, for use with an optical bus, uses a peak detector(s) to adaptively establish an instantaneous logic threshold at the beginning of a data burst. A reset circuit resets the peak detector(s) and other circuits of the receiver in response to an end-of-packet reset signal, thereby enabling the reception of closely-spaced burst date packets which have greatly differing power levels.
摘要:
An electric power steering device includes a steering column in which a steering shaft for transmitting a steering torque is built, an electric motor for transmitting a steering assist force through a gear mechanism in a gearbox to the steering shaft, and a control device for driving and controlling the electric motor. The control device includes a drive circuit module having a switching element for driving the electric motor, and a control module that is mounted on the gearbox for controlling the drive circuit module. The drive circuit module is mounted on a housing of the electric motor.
摘要:
An optical network unit useful in a passive optical network has capability for automatic shutdown upon detection of a malfunction, thereby protecting the integrity of upstream data transmitted in the network. The unit detects the generation of upstream light during intervals in which transmission is not authorized. In response, the light source of the unit is deactivated to prevent collisions with upstream data from other optical network units in the network.
摘要:
An electronic apparatus which detects when a battery having a different characteristic is mixed in a plurality of batteries accommodated therein. An average voltage V1 per battery of plural batteries connected in series and an average voltage V2 per battery at a connecting point halfway of those connected batteries are detected. A difference in voltage |V1−V2| between the average voltage V1 and average voltage V2 is compared with a tolerable voltage difference ΔV. If it is determined that a battery having a different characteristic is mixed, the operation of the apparatus is interrupted and an alarm is displayed or the supply of power is shut down.
摘要:
A data driver is provided that comprises: a state controller that effects transition to any of multiple states including a display ON state, a display OFF state and a sleep state, then outputs a drive control signal associated with a state of a transition destination; and a drive circuit that drive the data lines using drive power corresponding to a drive signal based on the drive control signal. When first setting data is input during the sleep state, the state controller effects transition from the sleep state to the display OFF state, and when second setting data is input during the sleep state and is followed by input of the first setting data, the state controller effects transition from the sleep state to the display OFF state, then effects transition from the display OFF state to the display ON state.
摘要:
A display driver including: a hold circuit; a D/A converter converting display data from the hold circuit; and an output selector receiving a gray scale voltage based on output of the converter into a first input terminal and outputting a drive voltage to a drive voltage output terminal, the hold circuit including first to n-th latch circuits. In normal operations, the hold circuit outputs data latched in the latch circuits to the converter. In test operations, the hold circuit serially outputs data latched in the latch circuits as serial output data from the n-th latch circuit. The output selector has a second input terminal receiving the serial output data, outputs to the drive voltage output terminal the gray scale voltage inputted into the first input terminal in normal operations, and a voltage based on the serial output data from the hold circuit into the second input terminal in test operations.
摘要翻译:一种显示驱动器,包括:保持电路; D / A转换器从保持电路转换显示数据; 以及输出选择器,其基于所述转换器的输出端接收灰度级电压到第一输入端子,并将驱动电压输出到驱动电压输出端子,所述保持电路包括第一至第n锁存电路。 在正常操作中,保持电路将锁存电路中锁存的数据输出到转换器。 在测试操作中,保持电路串行地输出锁存在锁存电路中的数据作为来自第n个锁存电路的串行输出数据。 输出选择器具有接收串行输出数据的第二输入端,在正常操作中向驱动电压输出端输出输入到第一输入端的灰度电压,以及基于来自保持电路的串行输出数据的电压 第二输入端在测试操作。
摘要:
An optical network unit is associated with a multi-wavelength optical fiber communications system carrying low-power digital signals bidirectionally transmitted at a first and a second wavelength and a high-power analog video signal transmitted at a third wavelength. The unit comprises a housing having a connection for the optical fiber; and an optical filter, first and second optical units, and a beam splitter mounted in the housing. The optical filter is interposed between the fiber termination and the second optical unit, and is adapted to block light of the third wavelength but bidirectionally transmit light of the first and second wavelengths. The system is readily implemented, and any combination of the data and video services may be selected. A high level of skill is not required for changing the combination of services procured.