CMOS inverter– link1 — link2 – Determination of pull up / pull down ratios – Stick diagram – lamda based rules – Super buffers – BiCMOS & steering logic. , Current steering switch and hybrid BiCMOS multiplexer with CMOS A BiCMOS logic circuit operating as a gate comprising. A current steering switch circuit responsive to a cmos signal. Pdf a new bicmos circuit for driving large capacitive load. Bicmos technology seminar ppt and pdf.
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By enlarging the gate width, the basic gate-source voltage Vgs can be diminished until the threshold voltage Vth. The BiCMOS logic circuit recited in claim 11, wherein each of said respective load capacitance discharging means connected to an emitter of the NPN transistor of one of said pair of emitter followers comprises: Year of fee payment: The BiCMOS logic circuit recited in claim 1, characterized in that said load capacitance discharging means connected to an emitter of one of said pair of emitter followers consist of a nMOS transistor, a gate of said nMOS transistor connected to one of said positive terminal of said power supply and an emitter of the other of said pair of emitter followers.
If you are a society or association member and require assistance with obtaining online access instructions please contact our journal customer services team. According to a simulation result of basic delay times of these two, kinds of devices applied in an ECL gate of 1 fan-out with no wire lengththere is observed a certain difference between them, that is, 70 ps in the former device and 30 ps in the latter device, although these two devices both have their cutoff frequencies fT between 15 GHz and 20 GHz.
The BiCMOS logic circuit recited in one of claims 5 through 9 or 1 or 2, in combination with, sharing a common power supply with, and being on a common substrate with at least one circuit of a type selected from the group consisting of: Logic family page 1 logic family in computer engineering, a logic family may refer to one of two related concepts.
Bicmos is an evolved semiconductor technology that integrates two formerly separate semiconductor technologies, those of the bipolar junction transistor and the cmos transistor, in a single integrated circuit device.
These values are xnd to those of a NPN transistor materialized by a self-alignment process. Quickly replacing diodetransistor logic, it was used to build the mini and mainframe computers of the s and s.
The BiCMOS logic circuit recited in one of claim 8 and claim 9, wherein each of said respective load capacitance discharging means connected to said emitter of said NPN transistor of one of said pair of emitter followers comprises: The master latch latches input complementary logic signals by a falling edge of the clock signal C as steerinb in connection with FIG.
A whole range of newer families has emerged that use CMOS technology. A current steering switch circuit responsive to a cmos signal. In the case, larger discharging current of falling output signal can be obtained by using nMOS transistors in their saturation region, realizing a still faster BiCMOS logic gate.
It is only when both the first and the third nMOS transistors 6 and 17 become ON that an output signal logic at the second output terminal 22 is turned to LOW by a potential drop generated by current flowing through the first resistor 3.
Each of first complementary logic signals input to the third and the fourth input terminals 23 and 24 is denoted by A and A, respectively, and each of second complementary signals input to the first and the second input terminals is denoted by B and B, respectively. Several early transistorized computers e.
With the anticipated growth of bicmos technology for highperformance asic design, the issue of testing takes on great significance. In order to achieve the object, a BiCMOS logic gate of an embodiment of the present invention comprises: Reduced energy implies less heat dissipation.
And, it is apparent that a more stable and faster master-slave type flipflop can be provided by applying the latch circuit of FIG. Okamura, Hitoshi Tokyo, JP. Therefore, a primary object of the present invention is to overcome these problems of the prior arts above blcmos and to realize a logic gate of high applicability fabricated by a low-cost BiCMOS process, which can be implemented stably at high speed with a low bicmox supply voltage.
BiCMOS logic gate – NEC Corporation
Cascade connection of MOS transistors can be applied widely because of their characteristics that the threshold voltages can be reduced and steerimg operating speed does not sharply slow down with saturation, compared with bipolar transistors. Since the fifth nMOS transistor 19 remains ON, gated by drains of the fourth and the sixth nMOS transistors 18, 20 charged to potential of the positive power supply GND, output signals of the latch circuit remain unchanged.
This invention relates to a semiconductor integrated circuit, and more particularly to logic circuitry on the basis of a BiCMOS technology wherein bipolar transistors and MOS transistors are integrated on a common semiconductor substrate. Static Dynamic Domino logic Four-phase logic. CMOS chips often work with a broader range of power supply voltages than other logic families.
In addition, power supply voltage can be still diminished to smaller than 1. If you are a society or association member and require assistance with obtaining online access instructions please contact our. This is a certain merit for designing a transistor size for a semiconductor integrated circuit of a master slice method which realizes a desired logic by only a wiring process with standardized transistors oogic on a semiconductor substrate.
Bicmos and steering logic pdf book
Programmable combinational logic circuit. C1 and C3 represent a base-collector capacitance and a base-emitter capacitance respectively, with C3 being a collector capacitance to the semiconductor substrate.
The voltage swing of the complementary logic output signal are determined by the reference voltage and resistance ratio of resistors in the circuit, so that the output voltage swing is independent of power supply fluctuation or temperature change. So, the first and the second nMOS transistors 6 and 7 follows immediately to an input signal swing and a charge or a discharge of each drain begins at once. A short list of the most important family designators of these newer bidmos includes:.
The constant current supplied steerring collector of the first NPN transistor 5 is supplied as input current to the first current mirror in FIG.
Logic family – Wikipedia
From the equations 56 and 7a following equation is obtained. DTL was also made by Fairchild and Westinghouse.
Now, power supply voltage necessary for implementing the ECL gate is described. The BiCMOS logic circuit recited in claim 1, characterized in that said load capacitance discharging means connected to an emitter of one of said pair of emitter followers consist of a nMOS transistor, a gate of said nMOS transistor connected to one of said positive terminal of said power supply and an emitter of the other of said pair of emitter followers.
Since many different implementations of bicmos gates have been proposed, four representative ones are studied. And in addition, product of the constant current source multiplied by the resistance of the first or the second resistor 3 or 4 in FIG.