ECL integrated circuit allowing fast operation
First Claim
1. A semiconductor device comprising:
- a first bipolar transistor having first and second electrodes connected to first and second potentials, respectively, and a control electrode receiving an input signal;
a second bipolar transistor having first and second electrodes connected to said first and second potentials, respectively, and a control electrode receiving a reference signal;
a third bipolar transistor having a control electrode connected to said first electrode of said first bipolar transistor, a first electrode connected to said first potential and a second electrode connected to an output terminal node;
a fourth bipolar transistor connected between said output terminal node and said second potential for accelerating change of the potential of said output terminal node; and
adjusting means connected between a control electrode of said fourth bipolar transistor and said second potential for adjusting a current flowing into the control electrode of said fourth bipolar transistor in response to potential change of said output terminal node.
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Accused Products
Abstract
In an ECL circuit, when a potential of an input signal A changes from "L" to "H", an output signal D correspondingly changes from "H" to "L", and, at this time, an output sent from a switching stage circuit is supplied to a gate of a PMOS transistor via a control capacitor. Thereby, a base current of a pull-down transistor flows, and change of a potential of an output terminal node is promoted. An NMOS transistor receiving the potential of the output terminal node is arranged between a node and a VEE supply terminal. Therefore, when the potential changes, the current flowing through a transistor decreases, and the base current of the pull-down transistor further increases, so that the change of the output signal D is further promoted.
11 Citations
15 Claims
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1. A semiconductor device comprising:
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a first bipolar transistor having first and second electrodes connected to first and second potentials, respectively, and a control electrode receiving an input signal; a second bipolar transistor having first and second electrodes connected to said first and second potentials, respectively, and a control electrode receiving a reference signal; a third bipolar transistor having a control electrode connected to said first electrode of said first bipolar transistor, a first electrode connected to said first potential and a second electrode connected to an output terminal node; a fourth bipolar transistor connected between said output terminal node and said second potential for accelerating change of the potential of said output terminal node; and adjusting means connected between a control electrode of said fourth bipolar transistor and said second potential for adjusting a current flowing into the control electrode of said fourth bipolar transistor in response to potential change of said output terminal node. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A semiconductor device comprising:
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a first bipolar transistor having first and second electrodes connected to first and second potentials, respectively, and receiving on its control signal an input signal; a second bipolar transistor having first and second electrodes connected to said first and second potentials, respectively, and receiving on its control electrode a reference potential; a capacitor for taking out a potential from one of said first electrodes of said first and second bipolar transistors; a third bipolar transistor having a control electrode connected to said first electrode of said first bipolar transistor, a first electrode connected to said first potential and a second electrode connected to a first output terminal node; a fourth bipolar transistor connected between said first output terminal node and said second potential for accelerating the change of the potential of said first output terminal node in a first direction; first adjusting means connected between said first output terminal node and the control electrode of said fourth bipolar transistor for adjusting a current flowing into the control electrode of said fourth bipolar transistor in response to the potential of said capacitor; a fifth bipolar transistor having a control electrode connected to said first electrode of said second bipolar transistor, a first electrode connected to said first potential and a second electrode connected to a second output terminal; a sixth bipolar transistor connected between said second output terminal node and said second potential for accelerating the change of the potential of said second output terminal node in a second direction different from said first direction; and second adjusting means connected between said second output terminal node and a control electrode of said sixth bipolar transistor for adjusting a current flowing into the control electrode of said sixth polar transistor in response to the potential of said capacitor. - View Dependent Claims (12, 13, 14, 15)
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Specification