An amplifier system providing the voltage feedback which can be supplemented with current feedback without limiting the voltage excursion range at the amplifier system output.

An output amplifier for pulse generators comprises a first differential bipolar transistor amplifier stage for amplifying complementary voltage pulses and a second gallium arsenide field-effect (GaAs FET) transistor stage with two GaAs FET transistors wired as a common gate stage having a constant voltage bias. The GaAs FET transistor amplifier stage, responsive to the first amplifier stage, is used to generate high output voltage swings having fast transition times over a wide frequency band, w...

An output amplifier having a pair of controlled current generators each with an output impedance that is electrically connected to the other, a pair of output controllers each of which is across a corresponding one of the output impedances, and a pair of feedback impedances each connected from a corresponding one of the output controllers to a corresponding one of the controlled current generators. A differential amplifier is provided ahead of the controlled current generators with the amlifier ...

There is provided an output apparatus comprising: a 1st memory to store the print information of the 1st color; a 2nd memory which stores the print information of the 2nd color and has the same address arrangement as that of the 1st memory; a CPU as a reading device for allowing the print information of the 1st and 2nd colors to be simultaneously read out of the 1st and 2nd memories synchronously with the print timing for the 1st-color print information; and a timing adjusting circuit for delayi...

An output timer includes a capture register for capturing a count value held by a free running up-counter in coorporation with a transmission gate in response to an event signal applied to the output timer. An adder adds a first value stored in another register to the count value captured by the capture register and produces a sum. A comparator compares a count value held by the free running up-counter with the sum and outputs a coincidence signal when the count value and sum are equal to each o...

In order to reduce undesirable output noise, an output circuit is provided which includes a first output MOSFET which is interposed between an output terminal and a first power source voltage, and a second output MOSFET which is interposed between the output terminal and a second power source voltage. In particular, in accordance with one aspect of the invention, a feedback circuit is interposed between the output terminal and the gate of the first output MOSFET or/and between the output termina...

An output circuit for obtaining stable rising and falling characteristics regardless of variations in threshold voltages of output transistors. The output circuit obtains such favorable characteristics by using input signals changing in a complementary manner, a first MOS transistor which outputs a high potential level signal in response to a drive signal, and an output terminal for receiving the high potential level signal. In addition, the output circuit contains a drain-current control connec...

An output circuit provided with a photo coupler for transmitting a control signal from a control circuit to an output side in an electrically isolated condition, a load driving transistor (15), and a power supply stabilizing circuit (15) for supplying an electric power for driving the load driving transistor (13) from a load side power supply (13). The power supply stabilizing circuit includes a low voltage detection circuit and an input/output short-circuiting circuit, and the input/output shor...

An output apparatus comprises: a cache memory to temporarily store the bit map pattern data which was developed to the bit map pattern on the basis of character information; an accumulating device to accumulate a plurality of bit map pattern data extracted from the cache memory; a rewriting unit to rewrite the bit map pattern data stored in the cache memory; a print controller to print on the basis of the data accumulated in the accumulating device; a detector to detect an operating state in the...

The output circuit is provided with an operational amplifier, a current supply circuit and an impedance changing circuit. The current supply circuit supplies current to the operational amplifiers at rising and falling of an output signal delivered by the operational amplifier. The impedance changing circuit changes the impedance between the operational amplifier and an output terminal.