digitmation vray material library bittorrent

The buffer circuit of claim 2 wherein the phase splitter transistor (Q11) comprises a collector node coupled to the high potential power rail (V TTL) without connection to the base nodes of the first and second stage pullup transistors of the Darlington transistor pair (Q2,Q3).ĥ. The buffer circuit of claim 4 wherein the collector node of the anti-simultaneous transistor (Q5) is also coupled to the base node of the first stage pullup transistor (Q2).Ħ. The buffer circuit of claim 5 wherein the collector node of the anti-simultaneous transistor (Q5) in coupled to the base node of the first stage pullup transistor (Q2) through a first diode (D5), and is coupled to the base node of the second stage pullup transistor (Q3) through a second diode (D4).ħ.

The buffer circuit of claim 2 wherein the collector node of the anti-simultaneous transistor (Q5) is coupled to the emitter node of the first stage pullup transistor (Q2) and the base node of the second stage pullup transistor (Q3) through a diode (D5). The present invention relates to an improvement in electronic circuits, and particularly TTL circuits incorporating a totem pole. The invention provides an anti-simultaneous conduction circuit which reduces simultaneous conduction of the pullup transistor element and pulldown transistor element.

By reducing simultaneous conduction at the totem pole, the anti-simultaneous conduction circuit of the present invention reduces current spikes from the TTL power supply. Typical TTL circuits incorporating a totem pole include TTL buffers, TTL output gates or devices, TTL to ECL, and ECL to TTL converters, etc. A prior art TTL output device is illustrated in Figure 1. A pullup transistor element, Darlington transistor pair Q2 and Q3, sources current from the positive TTL power supply V cc through collector resistor R4 to an output node V o. A pulldown transistor element Q4 sinks current from the output node V o to ground or low potential.

Digitmation vray material library bittorrent