摘要:
A tri-state buffer circuit according to the present invention comprises a switching circuit connected to an input terminal (IN), tri-state and inverted tri-state input terminals (T, T), and a first power supply terminal for generating first and second switching signals (A, B) which have a first and second levels, respectively, only when the tri-state signal is on a first level, regardless the level of the input signal; an inverter circuit connected to said switching circuit, and the first power supply terminal for inverting the first switching signal (A) from said switching circuit as an output signal; a selection circuit connected to said switching circuit and inverter circuit for maintaining a signal, which have a second level, equal to the inverted signal only when the tri-state signal is on first level; a first type bipolar transistor whose base is connected to said inverter circuit, whose collecter is connected to the first power supply terminal, and whose emitter is connected to the output terminal of the tri-state circuit; and a first type bipolar transister whose base is connected to said selection circuit, whose collecter is connected to the output terminal of the tri-state circuit, and whose emitter is connected to a second power supply terminal.
摘要:
An output circuit which can operate at a high-speed and with a small power consumption is disclosed. The output circuit comprises a first series circuit including first and second transistors, an intermediate junction of the first and second transistors being connected to an output terminal, an impedance means, means for connecting one end of the impedance means to a power voltage terminal, and a third transistor connected between the other end of the impedance means to a second voltage terminal, one and the other ends of the impedance means being connected to control electrodes of the second and first transistors, respectively.
摘要:
A MOS logic circuit including a known MOS logic circuit arrangement having a particular input/output signal transfer characteristic and a control gating circuit including an FET connected to the known MOS logic circuit arrangement, the gate of which gating circuit receives a control voltage derived from an irreversible control voltage generator utilizing a fuse. Under the control of the irreversible control voltage, the MOS logic circuit can permanently change the known logic circuit arrangement's signal transfer characteristic without varying its logic function.
摘要:
A ternary logic circuit comprises a load element connected to one voltage level and to a node and a logic section connected to a second voltage level and the same node from which the circuit output is derived. The two voltage levels including the voltage supply and ground voltage enable the circuit to provide an output at three logic levels, "0", "1", and "2", depending on inputs to the logic section. The circuit may be implemented with CMOS technology using, in addition, N-channel or P-channel depletion devices, in different logic formats such as ternary extensions of NAND or NOR gate circuits with the logic section elements arranged in different configurations and combinations of pairs of CMOS devices.
摘要:
A three-output level logic circuit comprises an output stage and a drive stage for driving the output stage. The output stage includes first and second MOS transistors connected in series between first and second power sources and a terminal is provided for producing three-state output signals. The drive stage includes third to sixth MOS transistors connected in series between the first and second power sources. A terminal is provided for supplying a data signal to the fourth and fifth MOS transistors. A control signal is supplied in common to the gate electrodes of the third to sixth MOS transistors. The conductivity types of the first to sixth MOS transistors are selected to operate the logic circuit with one control signal input and one data signal input.
摘要:
A multi-level signal generating circuit is disclosed which comprises: a first CMOS inverter for inverting an input signal to produce a first output signal having high and low voltage levels; a second CMOS inverter for inverting the input signal to produce a second output signal having high and low voltage levels; at least one of the high and low voltage levels of the second output signals being different from said high and low voltage of said first output signal; and switching circuit operative to drive selectively said first CMOS inverter or said second CMOS inverter in response to a level of a control signal.
摘要:
A tristate driver circuit is provided having a logic input signal, to produce a logic 1 output level or a logic 0 output level, and a float input signal, to produce float state operation. The circuit comprises a first logic gate powered by a first buffer switch, a second logic gate powered by a second buffer switch, an output driver having a first driver input from the output of the first gate and a second signal driver input from the output of the second gate; the first and second buffer switches dissipating the greatest circuit power during the circuit float state operation, and means, coupled to the first and second buffer switches and to the source of float signal input signal, for interrupting power to the first and second buffer switches responsive to onset of the float state operation.
摘要:
Some embodiments include an apparatus having a flip-flop circuit, which can include a first tristate inverter, a second tristate inverter including an input node coupled to an input node of the first tristate inverter; a first additional inverter including, and a second additional inverter including an output node coupled to an output node of the first additional inverter; a first memory including a first memory node coupled to an output node of the second tristate inverter, and a first additional memory node coupled to an input node of the first additional inverter; and a second memory including a second memory node coupled to an output node of the first tristate inverter, and a second additional memory node coupled to an input node of the second additional inverter.
摘要:
A circuit for generating a modulated signal in a transmitter of an integrated circuit is disclosed. The circuit comprises a transmitter driver circuit having a first current path for receiving a first input signal of a pair of differential input signals and a second current path for receiving a second input signal of the pair of differential input signals, the transmitter driver circuit comprising a tail current path coupled to each of the first current path and the second current path; a first current source coupled between a first reference voltage and ground, wherein a first current of the first current source is proportional to the tail current of the tail current path; a first pull-up current source coupled between the first reference voltage and a first output node of the transmitter driver circuit; and a second pull-up current source coupled between the first reference voltage and a second output node of the transmitter driver circuit. A method of generating a modulated signal in a transmitter of an integrated circuit is also disclosed.
摘要:
Multi-threshold flash Null Convention Logic (NCL) includes one or more high threshold voltage transistors within a flash NCL gate to reduce power consumption due to current leakage by transistors of the NCL gate. High-threshold voltage transistors may be added and/or may be used in place of one or more lower voltage threshold transistors of the NCL gate. A high-Vt device is included in the pull-up path to reduce power when the flash NCL logic gate is in the null state.