When a light wave passes through an optical fiber used as an optical communication line, different time delays are introduced in its frequency components according to the delay characteristic of the optical fiber, limiting the usable bandwidth. An optical equalizer according to the present invention comprises a multi-stage connection of one or more unit optical circuit elements for introducing time delays opposite to the delay characteristic of the optical fiber in frequency components in the ne...

The shuttlecar equalizer has a pair of spaced apart equalizer members each of which is of one-piece construction and each of which includes an operatively centrally pivoted equalizer bar and upstanding ears at each end. A rigid structure extends between and connects the equalizer members to one another. The equalizer members are designed for the connection thereto of wheel end unit support structures which form part of the wheel end units themselves and which locate in use between the ears of th...

An automatic equalizer includes an adaptive matched filter connected in front of a decision feedback equalizer of a conventional design. The adaptive matched filter has an A/D converter for sampling and quantizing an analog baseband signal into a digital signal, which is applied to a transversal filter. The transversal filter is supplied with tap coefficients adaptively controlled by a control signal generator which makes automatic adjustments to symmetrize the impulse response of a transmission...

An automatic equalizer is provided that can suppress errors in code decisions by constraining the selection of survivor paths in a Viterbi calculation. A constraint condition selection circuit 106 inputs the received signal and outputs constraint condition selection signals for selecting constraint conditions corresponding to the regularity of the code that is to be decided, a constraint condition generation circuit inputs k.sup.M series of candidate signals and constraint condition selection si...

A waveform equalizer is designed to perform high frequency enhancement on a read signal without increasing inter symbol interference even when the shortest run length of the read signal is not greater than twice the clock period of the channel clock signal. An addition value of weighted values of signal levels of an amplitude limited read signal obtained by limiting the amplitude of the read signal, where the signal levels are at first and second points of time, is added to a signal level at an ...

A delay equalizer includes an amplifier with differential inputs, to which an input of the equalizer is coupled via first and third impedance circuits, and which are coupled to circuit ground via second and fourth impedance circuits, respectively. One of the first and second impedance circuits is constituted by a resistor, the other by a frequency-dependent network consisting of one or more tuned network sections. The third and fourth impedance circuits can similarly be a frequency-dependent net...

A clamping device which has a plurality of elongated clamping members joined to a clamp main frame by a pair of slideable side plates which allow the separate clamping members to be moved axially relative to each other and to the clamp main frame so that the clamping members can be adjusted to compensate for irregularities in those workpieces to be clamped that require coaction of two or more clamping members. The slideable side plates are fixed to the clamp main frame and connected to the clamp...

Some embodiments of the invention include apparatus, systems, and methods to adjust a clock generator and an equalizer to reduce jitter in an output signal. A phase detector provides feedback information on a first feedback loop and a second feedback loop. A clock adjustment circuit uses the feedback information on the first feedback loop to adjust a clock generator. An equalizer adjustment circuit uses the feedback information on the second feedback loop to adjust the equalizer. Other embodimen...

In one embodiment, a device includes: first, second, and third paired-strand levers each configured to receive a pair of tensile strands at locations spaced apart from one another along the paired-strand lever; first, second, and third fulcrums each supporting a corresponding one of the paired-strand levers between the tensile strand receiving locations; a fourth lever linked to the first and second paired-strand levers through the first and second fulcrums, respectively, at secondary lever link...

Since a conventional adaptive equalizer handles an update quantity control parameter .mu. as a fixed value, the update quantity control parameter .mu. is not optimized adaptively to variation of a channel state and the BER characteristic is deteriorated. Thereupon, the invention controls a parameter .mu. for controlling the update quantity of updating the impulse response of a channel by the adaptive algorithm operating portion 2 according to an estimated BER value, by performing a BER estimatin...