The invention is applied to regulators with feedforward control.

As a result, the feed forward circuit extends the dynamic range of the operational amplifier.

A method and apparatus for adaptive precompensation is disclosed.

Additional programmable elements include an amplifier element that is programmed to provide a corresponding level of write current and a precompensation block for providing data signal precompensation.

In addition, a microphone may be used to convert the resulting sound pressure wave into a sound signal and a precompensating filter modifier may be used to modify the precompensating filter in response to the sound signal.

The feed-forward value having the time delay is added to the output of a position loop as a feed-forward value of the position to execute feed-forward control.

Time encoding machines with multiplicative coupling, and optional feedforward or feedback are provided.

A method of optimizing performance of an optical system, using pre-compensation is also disclosed.

The feed-forward control loop produces an output from the first circuit, the reference source and the frequency input being sufficient to determine the output of the feed-forward control loop.

The vector modulator (114) conditions the result of the subtraction process (112) to produce the feedforward signal.

Methods, media and signals for determining optimum pre-compensation in an optical system.

The precompensation scheme is based on a knowledge of the bit pattern and the amount of energy contained in a sequence of bits.

Knowledge of the error patterns are used apriori to adaptively change the tap coefficients in a feedforward filter.

The feed forward circuit responds to the differential output in order to increase and decrease current to the output terminal.

On the eighth edge, feed forward circuitry (60, 62, 64, 68, 70) forces the last three stages to change states simultaneously.