A unity gain amplifier of the Diamond follower type provides the combination of negligible input offset voltage, high slew rate, and high bandwidth by providing first and second opposite polarity current mirror circuits which respond to currents flowing through first and second input transistors to boost current available to charge parasitic capacitances during fast rise times and fast fall times of an input pulse. The rapid charging and discharging of the parasitic capacitances eliminates degra...

A linear amplifier is configured with a current-feedback amplifier followed by a voltage-feedback amplifier to drive a totem-pole output stage. The output stage includes a series arrangement of an npn transistor and a pnp transistor with their emitters coupled in series and to an output node. The voltage amplifier driving the output stage is also configured with totem-pole elements, wherein a conductive path between the voltage-feedback amplifier and an output transistor is included to reduce co...

To prepare suspension fertilizers from nitric acid solutions of phosphate rock the solutions are neutralized in an already neutralized solution in a vessel by means of ammonia and/or an ammonium salt of carbonic or carbamic acid, a pH of from seven to 10 and a temperature of from 10.degree. to 50.degree. C. being maintained. During or immediately after the neutralization, substances containing carbonate ions and/or forming carbonate ions in solution are introduced. The finished suspension should...

Circuitry for increasing the maximum output current magnitude of a diamond buffer (Q57,58,74,75) having increased maximum output current provides a bias current of a first magnitude (I) into an emitter of a PNP first input transistor (Q57) and sinks a bias current of the first magnitude out of an emitter of an NPN second input transistor (Q55). The decrease is sensed in a collector current of the first input transistor caused by a demand for increased base current by a NPN first output transisto...

There is provided a power amplifier circuit that applies an output voltage according to a given input voltage to a load, the power amplifier circuit includes an amplifying section of which an output port is connected to the load and that outputs the output voltage according to the input voltage, a source-side power source path that supplies an electric current output from the amplifying section via the output port to the amplifying section, a sink-side power source path that supplies an electric...

Correction of the setting point of a transistor amplifier stage with supply voltage variations by supplying additional base biasing current, which compensates the influence of the base-emitter voltage.

The same input signal is applied to each of the bases of a pair of amplifying transistors, while an output signal is produced at the emitter of one of the pair of transistors. The collector of the one transistor is connected to the emitter of the other transistor. The junction point between the collector of the one transistor and the emitter of the other transistor is connected through a diode to a first DC power source of low voltage. A second power source of high voltage is connected to the co...

A bias circuit for a complementary transistor power amplifier output stage which comprises a biasing transistor having its emitter connected to the base of one of the complementary transistors and its collector connected to the base of the other of the complementary transistors. A collector resistor is in circuit with the collector of the biasing transistor and with a source of biasing potential. The input signal to the amplifier is coupled to the emitter of the biasing transistor and to the bas...

A transistor amplifier includes two coupled push-pull amplifier stages and bias stabilization is achieved by the use of a diode-transistor combination in the emitter leads of the respective complementary transistors which comprise the first stage.

A class B push-pull amplifier has an output stage formed of two transistors having their connector-emitter paths connected in a series path across a direct voltage source. The transistors are controlled by a driver transistor which is supplied via an additional transistor having a resistance connected in series with its emitter. A further transistor having its base-emitter path connected across this resistance is so arranged and controlled that variations in the voltage of the voltage source hav...