摘要:
Three state latch. In accordance with a first embodiment, an electronic circuit includes n pairs of cascaded logical gates. Each of the n pairs of cascaded logical gates includes a first logical gate including n−1 first gate inputs and one first gate output, and a second logical gate including two second gate inputs and one second gate output. One of the second gate inputs is coupled to the first gate output. The second gate output is cross coupled to one of the first gate inputs of all other the pairs of cascaded logical gates, and n is greater than 2.
摘要:
A sequential control circuit capable of sequencing through a number of stable states in a predetermined order, starting from a predetermined stable state and sequencing in either of two opposite directions. A contact maker having two transient positions is connected to a timing circuit and to a logic circuit. In response to assumption by the contact maker of one of its transient positions, the timing circuit provides a timer signal delayed with respect to the interval of that transient position. The logic circuit sequences through a number of output conditions corresponding with the stable states in a direction determined by the particular transient position. The logic circuit includes circuitry for placing the circuit in a predetermined one of the output conditions upon initial start up.
摘要:
A compact and efficient design of a function switching and indication arrangement for a TV receiver or other communications apparatus is described. The functional setting, illustratively indicative of a selected one of a plurality of TV channels, is chosen by the depression of an associated one of a plurality of keys that are respectively connected to externally accessible first switching terminals of a corresponding number of transistorized binary multivibrators that are arranged in an integrated circuit. The outputs of the multivibrators are coupled, on the integrated circuit chip, to a corresponding plurality of multi-collector transistors, one of whose outputs is used to reset the multivibrators of the non-selected channels, and another of whose outputs is employed to set the selected channel itself. A light emitting diode or other suitable visual indicator is connected in series with the key across the terminals of an energizing DC source, so that both such indicator and the key are coupled to a common access switching terminal of the associated multivibrator. The depression of the key serves simultaneously to provide a selection signal for the appropriate channel, to disable the multivibrator and indicator for each of the other channels, and to illuminate the indicator coupled to the depressed key.
摘要:
A driver circuit includes a first output terminal, a first switch, a second switch, a third switch and a power source. The first output terminal is arranged for outputting a data output. The first switch is selectively coupled between the first output terminal and a power supply node according to a data input. The second switch is selectively coupled between the first output terminal and a first reference node according to the data input. The third switch is selectively coupled between the first reference node and a reference voltage. The power source is configured to selectively provide one of a supply voltage signal and a supply current signal to the power supply node. When the power source is configured to provide the supply voltage signal, the third switch is switched on. When the power source is configured to provide the supply current signal, the third switch is switched off.
摘要:
Three state latch. In accordance with a first embodiment, an electronic circuit includes n pairs of cascaded logical gates. Each of the n pairs of cascaded logical gates includes a first logical gate including n−1 first gate inputs and one first gate output, and a second logical gate including two second gate inputs and one second gate output. One of the second gate inputs is coupled to the first gate output. The second gate output is cross coupled to one of the first gate inputs of all other the pairs of cascaded logical gates, and n is greater than 2.
摘要:
In accordance with a first embodiment, an electronic circuit includes a single latch having three stable states. The electronic circuit may be configured so that all three outputs reflect a change at any one input in not more than three gate delays. The electronic circuit may further be configured so that when all inputs are set to one, a previous state of the latch is retained and output on the outputs.
摘要:
A semiconductor device includes a first semiconductor chip operating at a first power supply voltage and a second semiconductor chip operating at a second power supply voltage lower than the first power supply voltage to supply the second power supply voltage to the first semiconductor chip. The semiconductor chips according to the present invention are conveniently used for fabrication of the semiconductor device. The first semiconductor chip includes an output circuit including a first transistor and a second transistor, interconnected in series and turned on or off complementarily. The output circuit outputs a signal to a first external output terminal. The first semiconductor chip also includes a third transistor connected in series with the first and second transistors and having a gate electrode connected to a second output terminal. The entire chip area is reduced, as compared with the case where plural semiconductor chips, operated at different operating voltages, are interconnected and used as such in a semiconductor device provided with an input/output buffer operating at a voltage different from the respective operating voltages resulting in an increased chip area.