A mouse for use in a video display system for controlling cursor movement on a display screen provided with feedback means which produces resistance to the motion of the mouse as the cursor moves across predetermined areas of the display screen. In its most straight forward realization it comprises an electromagnet and control circuit which operates independently of the pickup and location sensing control of the mouse to produce a magnetic field which acts cooperatively with a substantially plan...

A high-performance and high-band feedback controller which provides a state observer in which an amount of state or an amount to be controlled outputted from a detector part and an amount of operation are input signals, presumes the amount to be controlled which is closer to a true value, can compensate for deviations from desired characteristics such as a mechanical resonance characteristic and a delay time characteristic in a high frequency band of an object to be controlled and a detector par...

A programmable variable degree of tactile feedback for the operation of a manipulator by a pair of motors, one connected to the load and one to the control. Computer controlled four quadrant regulators for each motor are used to drive the load motor shaft to the same position as the control motor shaft and to vary the feedback force on the control motor in proportion to selected forces developed during the manipulation process.

A feedback amplifier is disclosed wherein two trifilar transformers are used to couple into and between a main signal amplifier and an error amplifier. The signal source is connected in series with one winding in the main amplifier transformer and one winding of the error amplifier transformer. A second winding of each transformer is connected, respectively, to the input port of its associated amplifier, while the output from each amplifier is connected to the third winding of the other's transf...

An amplifier including first and second stages and a feedback loop has an output terminal coupled to a temperature compensated clipping circuit. A signal appearing at the amplifier output terminal and approaching a predetermined clipping level causes a diode in the clipping circuit to conduct. The conduction of the diode alters the feedback to the amplifier such that the altered gain of the amplifier compensates for the nonlinear conduction characteristics of the clipping diode whereby the signa...

A feedback amplifier circuit includes an inversion circuit, a level shift circuit, and a feedback resistive element. The inversion circuit includes an input active element and a load element connected in cascade with respect to a voltage source. The level shift circuit includes a field effect transistor having a gate connected to the output of the inversion circuit, a diode or diodes, a constant current active load connected in cascade with respect to the voltage source, and the feedback resisti...

A high-performance and high-band feedback controller which provides a state observer in which an amount of state or an amount to be controlled outputted from a detector part and an amount of operation are input signals, presumes the amount to be controlled which is closser to a true value, can compensate for deviations from desired characteristics such as a mechanical resonance characteristic and a delay time characteristic in a high frequency band of an object to be controlled and a detector pa...

A feedback controller inputs a reference signal instructing a controlled variable output from an object operated in accordance with a control signal and a feedback signal, to calculate the control signal such that the feedback signal is equal to the reference signal, and to supply the calculated control signal to the object. The controller has a transfer function Gf, and functions to generate the following response waveform f (t) due to a disturbance. That is, a response waveform of the controll...

A three-terminal current amplifier with current-mode feedback to stabilize its current gain to be substantially independent of the common-emitter forward current gains of its component transistors. The feedback connection is made by means of a current splitter which includes a pair of emitter-connected transistors operated at substantially the same absolute temperature, T. These transistors have a potential substantially linearly proportional to T applied between their base electrodes. The curre...

A high-performance feedback controller having both a target value followability and a disturbance suppression characteristic is provided, and its characteristic arrangement is as follows. In a feedback controller, which receives a target value r and a controlled variable y and supplies a manipulated variable u as a calculation output to a control object which has at least one input u as a manipulated variable and at least one output y as a controlled variable, a compensator G.sub.c (s), whose in...