Abstract: A phase adjustment circuit includes: a carrier-wave-delay adjusting circuit for delaying an input carrier wave and outputting the delayed carrier wave, in accordance with phase information; and a phase-difference detecting/adjusting circuit for detecting a phase difference between an input signal and the delayed carrier wave, outputting, as the phase information, a value according to the detected phase difference, adjusting the delayed carrier wave such that the delayed carrier wave has a phase substantially coincident with a phase of the input signal, and outputting the resultant carrier wave as a phase-adjusted carrier wave. In a steady state, the phase-difference detecting/adjusting circuit outputs, as the phase information, a value indicating the presence of a phase difference.

Abstract: To perform gain adjustment of the amplitude of a binary phase shift keying (BPSK) wobble signal from a DVD to enable high-precision demodulation of address information, a peak detection circuit detects a peak value in a time period equal to or more than a half period of the input wobble signal. A gain computation circuit computes a gain adjustment coefficient from the peak value. The gain adjustment coefficient is limited to within a fixed range by a limiter and then supplied to a multiplier. To adjust digital-related delay generated when the gain adjustment coefficient is computed, the input wobble signal is delayed by a delay circuit before being supplied to the multiplier. The multiplier multiplies the wobble signal from the delay circuit by the gain adjustment coefficient and outputs the result as the digital AGC output.

Abstract: A vehicle lamp mounted on a vehicle body which can lean to one side at the time of turning, i.e., going around a curve, moving circularly, or the like. The lamp can include a first ellipse group reflecting surface having a movable part and an opening part, and a second ellipse group reflecting surface corresponding to an area covering a moving range of the opening part. The movable part of the first ellipse group reflecting surface can move by a drive unit to form a main light distribution that is kept in a substantially horizontal position. Light rays that pass through the opening part reach the second ellipse group reflecting surface and are reflected and illuminate an area ahead of the vehicle body when it leans to one side.

Abstract: A path storing circuit has path holding parts at a plurality of stages storing a survivor path and corresponding to times. A majority decision circuit receives output values of three delay circuits including the top and bottom delay circuits each receiving a selected output of a selector out of six delay circuits in the path holding part at the final stage and makes a decision by a majority.

Abstract: A vehicle lamp mounted on a vehicle body which can lean to one side at the time of turning, i.e., going around a curve, moving circularly, or the like. The lamp can include a first ellipse group reflecting surface having a movable part and an opening part, and a second ellipse group reflecting surface corresponding to an area covering a moving range of the opening part. The movable part of the first ellipse group reflecting surface can move by a drive unit to form a main light distribution that is kept in a substantially horizontal position. Light rays that pass through the opening part reach the second ellipse group reflecting surface and are reflected and illuminate an area ahead of the vehicle body when it leans to one side.

Abstract: A waveform equalizer, which has a partial response characteristic represented in the form of PR (a, b, c, b, a) which is a quaternary transfer function characteristic, is made up an analog filter, an ADC (analog/digital converter), and an FIR filter, for providing matching with the frequency characteristic of a read back waveform read from a recording medium. Such signal processor characteristic approximation to the regenerative signal characteristic makes it possible to easily achieve equalization without particularly emphasizing the regenerative signal, thereby achieving a reduced circuit scale.

Abstract: In an adaptive auto equalizer for automatically amending a signal distorted through propagation in a transmission line to the expected value, each multiplication unit includes a plurality of weight coefficient holding units for storing weight coefficients. The number of these weight coefficient holding units is the same as the clock number which is equal to a delay required for updating the weight coefficients. An adder calculates weight coefficients every clock. The storage location of the calculated weight coefficients is switched by a selector, and the weight coefficients calculated every clock are serially held in a corresponding one of the weight coefficient holding units. The other selectors serially select one of the plurality of weight coefficient holding units and the weight coefficients thus held are given to the multiplication units.