Motorola ECL 10,000 basic gate circuit diagram from 1972. [1] Note the Q5 and Q6 emitters coupled to the output. In electronics, emitter-coupled logic (ECL) is a high-speed integrated circuit bipolar transistor logic family.ECL uses a bipolar junction transistor (BJT) differential amplifier with single-ended input and limited emitter current to avoid the saturated (fully on) region of ...

2024年9月29日 · ECL (emitter-coupled logic) is a high-speed integrated circuit bipolar transistor logic family in electronics. To avoid operating in the saturated (completely on) zone and its sluggish turn-off behavior, ECL employs an overdriven bipolar junction transistor (BJT) differential amplifier with a single-ended input and a restricted emitter current.

The Propagation Group ECL Design Guide - 6 - termination scheme for ECL devices, even though it imposes greater power requirements [3]. As a final note on terminations, placement of the termination circuit is important. When connecting an output on device A to an input on device B, the termination

ECL devices in differential amplifier design offer broad performance flexibility, so ECL circuits allow being used both as digital and linear circuits. ... The operation of emitter-coupled logic is, that whenever the HIGH input is given to the ECL circuit, then it will make the ‘Q1’ transistor ON and the Q2 transistor OFF but the Q1 ...

ECL.1 Basic ECL Circuit The basic idea of current-mode logic is illustrated by the inverter/buffer circuit in Figure ECL-1 on the next page. This circuit has both an inverting output (OUT1) and a noninverting output (OUT2). Two transistors are connected as a differential amplifier with a common emitter resistor. The supply voltages for this ...

University of Connecticut 116 The ECL Advantage n All of the BJT-based logic gates discussed so far use the transistors as saturated switches. n In addition, operation of the RTL, DTL, and TTL gates involves relatively large voltage swings on the p-n junctions. n ECL gates are inherently FASTER than the other BJT-based logic gates because the transistors stay forward active and the

This paper proposes the high speed digital circuit design techniques in order to obtain a small circuit area and low power dissipation. The proposed techniques are a developed feedback controlled current source-active pull down-emitter coupled logic (FCCS-APD-ECL) and a current mirror biasing circuit of gated diode-active pull down-emitter coupled logic (GD-APD-ECL). The technique of FCCS-APD ...

In ECL circuits, an inverter is typically implemented using a pair of transistors in a differential amplifier configuration. As shown in the figure-1, The ECL inverter circuit consists of two transistors: an transistor (Q1) and a transistor (Q2). The emitters of Q1 and Q2 are commonly connected, forming a differential pair.

2018年7月12日 · Let’s define the logic high and logic low as 4.4 V and 3.6 V, respectively, and examine the operation of the circuit in Figure 1. Figure 1. An ECL inverter/buffer . ... If a negative power supply is used, a clean ground needs to be distributed throughout the ECL-based portion of the design. The same considerations should be applied to power ...

The basic Emitter Coupled Logic circuit shown in Fig. 47.5 can be used as an INVERTER if the output is taken at V OUT1.The basic circuit can be expanded to more than 1 input by paralleling transistor Q 1 with other transistors for the other inputs, as illustrated in Fig. 47.6(a). Here either Q 1 or Q 3 can cause the current to be switched out of Q …