SU482012A1 - Pulsed power amplifier transistor - Google Patents

Description

I Invention of oTfiocHTCH to the field of impulse technology. A known impulse power amplifier on MIS-transmistors, containing veins with tokostabi load on three transistors and one cogging device and output push-pull stage with charge and discharge transistors. The purpose of the invention is to increase the output signal amplitude and increase KO3 (} j45H of the power supply voltage ratio. For this, the output of the valve is connected to one side of the other condenser, the second of which is connected to the gate of the charge transistor -. jcTOpa of the push-pull cascade and through additional MOS-traisistors with a power supply bus and a common drive. The drawing shows the circuit of the proposed device. The amplifier contains Three MIS transistors 1, 2, 3 and the first capacitor, 4, connected according to valve with t ostabilizing load, as well as a back-up transistor 5 and discharge 6, connected but the circuit 11 of the O-cascade. The output electrode of the valve is connected to one plate of the second capacitor 7, The Yun power supply bus is a common bus 11. The gates of transistors 1, 6, 8, and 9 are connected to the output terminal 12 of the amplifier. The output signal is taken from the output electrode 13 of the nushpulnogo cascade. The scheme works as follows. At the initial moment, the input voltage is high. Then transistors 1, 6, 8 and 9 are open. The output voltage of the valve is close to zero. The voltage at the gate of the charging transistor 5 is determined by the coefficient 4) of the transmission divider of the real divider formed by the open transistors 8 and 9, the parameters of which are chosen: so that this voltage is equal to the threshold voltage of the MDL transistors. Wherein. the capacitor 7 is charged before the voltage, close to the threshold voltage of the MOS transistors, and the traistor S is locked and the output voltage is zero. When the signal i / iyjibCHoro is applied to the input, which locks transistor 8 and 9, the discharge circuits of the kadensator 7 are cut off, and the initial drop in the center is; the strap on it is maintained. At the same time, at the outlet of the valve, a pulse is formed with an amplitude close to the supply voltage. This pulse is transmitted through the capacitor 7 to the charging transistor 5, the gate of which turns out to be an iodine potential equal to the sum of the initial voltage, "a, capacitor 7 and the amplitude of the pulse

st outlet valve

Since the transistor 6 is airing under

the influence of the input signal, and the transistor S is uncovered under the influence of; the potential on its gate (e, the voltage on: the output of the amplifier rises. Since the potential at the gate of the transistor: 5 exceeds the supply voltage by the value of the supply voltage of the transistor,

the voltage of the amplifier is equal to | power supply voltage.

. / g,

PREDIMETI AND 3 ABOUT THEM and and and

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A pulsed power amplifier based on MIS transistors, containing a gate with a tokostable load on three transistors and a capacitor and a pin-type push-pull stage with a charging and discharging transistor, which is to increase the amplitude of the output signal the increase in the utilization rate of the supply voltage, the output of the valve is connected to one plate of another capacitor, the second plate xc, which is directly connected to the gate of the push-pull transistor

cascade and through additional MOS-trans. zistfy With a power supply bus and a common bus.