Push-pull output stage of integrated circuit providing enhanced

Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons

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307443, 307448, 307473, 307594, 307596, H03K 3013, H03K 513, H03K 1728, H03K 17687

Patent

active

050362321

ABSTRACT:
A push-pull output stage of an integrated circuit for generating a pulse-like output signal in dependence upon a pulse-like input signal. The push-pull output stage includes complementary output field-effect transistors which are formed by respective first and second groups of parallel-connected subtransistors (P1 to P4; N1 to N4), the subtransistors in each group being of the same conductivity type and opposite from that of the subtransistors in the other group. A resistance element (TP0 to TP3; TN0 to TN3) is connected into the lead to each gate electrode of each of the subtransistors (P1 to P4; N1 to N4) of the two groups of subtransistors. A disconnecting field-effect transistor (PD1 to PD4; ND1 to ND4) is associated with each subtransistor (P1 to P4; N1 to N4) of the two groups of subtransistors. Connected in parallel with each group of subtransistors (P1 to P4; N1 to N4) is a control field-effect transistor (MN, MP) of respective opposite conductivity type which is connected as a source follower with respect to the input signal and the output signal. The subtransistors of each group and the resistance elements corresponding thereto form a distributed RC network to facilitate high-low voltage level signal transition of the signal during the operation of the integrated circuit, while the control transistor enhances the edge steepness of the signal in the center region of the signal when undergoing a transition. The push-pull output stage thereby inhibits ground bounce from the overshoot of the pulse-like signal which could cause an inaccurate interpretation of the voltage level of the pulse-like signal.

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Texas Instruments, Advanced CMOS Logic, Designers Handbook, Chapter 3.1.5, pp. 3-9 to 3-11, 1987.

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