摘要:
Disclosed is a novel semiconductor integrated circuit device for use in a color VTR (Video Tape Recorder). Concretely, the semiconductor integrated circuit device comprises a substantially rectangular semiconductor chip which has a principal surface, a luminance signal processing unit and a color signal processing unit which are disposed at the positions of the principal surface opposing to each other, and a semiconductor region which is provided in the interspace of the principal surface between the luminance signal and color signal processing units opposing to each other and which is supplied with a bias stable A.C.-wise. Further, the semiconductor region is located substantially at the central portion of the semiconductor chip and is extended so as to intersect with one set of opposing sides of the rectangular semiconductor chip.
摘要:
An integrated programmable logic array formed within a single silicon chip comprises a combination of a logical product gate array and a logical summation gate array. The logical product gate array is equipped with a plurality of MIS field-effect transistors whose gates are selectively driven by a plurality of input signals. Source-drain paths of these transistors are connected in series. The logical summation gate array is equipped with a plurality of inverted bipolar transistors having collector-emitter paths which are connected in parallel.
摘要:
An integrated programmable logic array formed within a single silicon chip comprises a combination of an NAND or AND gate array and an NOR or OR gate array.The NAND or AND gate array includes a plurality of bipolar transistors which are driven to operate in the forward direction by a plurality of input signals, and a plurality of Schottky barrier diodes provided between the collectors of the bipolar transistors and output signal lines. The NOR or OR gate array includes a plurality of other bipolar transistors which are driven to operate in the backward direction by a plurality of output signals from the NAND or AND gate array.
摘要:
A semiconductor integrated circuit includes low voltage operation circuitries such as I.sup.2 L and high voltage operation circuitries operating at a higher voltage than the low voltage operation circuitries. Both of the low and high voltage operation circuitries are implemented in a single semiconductor chip in coexistence with each other. The low voltage operation circuitries are disposed in constant current paths in the high voltage operation circuitries so that the currents once used by the high voltage operation circuits are utilized again by the low voltage operation circuitries. Power dissipation of the whole integrated circuit is thus reduced significantly.
摘要:
A logic circuit is provided which includes a first multi-emitter transistor with its emitters coupled to a group of first input lines and a first transistor with its base coupled to the collector of said first multi-emitter transistor. A second transistor is also provided with its base coupled to the collector of said first transistor, said second transistor having a polarity opposite to that of said first multi-emitter transistor. A second multi-emitter transistor is connected with its base coupled to the collector of said second transistor and with its emitters coupled to a group of second input lines, and a third transistor is connected with its base coupled to the collector of said second multi-emitter transistor and with its collector coupled to an output line. The collector of said first multi-emitter transistor is coupled to the emitter of said second multi-emitter transistor in order to absorb minority carriers stored in the transistors. This feature significantly improves the circuit operating speed. A further feature is the provision of a logic circuit which is highly integrated and which consumes reduced amounts of electric power, while maintaining high-speed performance of the TTL circuit, by substituting a multi-collector transistor that reversely operates for an inverter portion of the TTL circuit.
摘要:
A logic circuit of a large scale which consumes small amounts of electric power is comprised of a plurality of ROM portions each formed of IIL circuits. Input signal lines are commonly used to transmit input signals to the ROM portions. The plurality of ROM portions are selectively operated by ROM select signals, and outputs corresponding to the input signals are obtained from a selected ROM portion. To select a particular ROM portion out of the plurality of ROM portions, the emitters of inverse npn transistors of IIL circuits constituting the selected ROM portion are rendered to assume ground potential. In the meantime, the emitters of the inverse npn transistors of IIL circuits in the non-selected ROM portions are held in a floating condition. This makes it possible to obtain a logic circuit which consumes small amounts of electric power with a very simple construction since the non-selected ROM portions consume no power.
摘要:
A first reproduced color under signal is delayed by one or two horizontal periods by a delay circuit, and this delayed second reproduced color under signal and the aforementioned first reproduced color under signal have their frequencies converted individually by first and second frequency converters into standard color signals. An oscillatory frequency signals of 2n of carriers for the aforementioned frequency conversions are divided to have the aforementioned carrier frequencies and to produce four carriers having phases of 0, 90, 180 and 270 degrees. These carriers are selectively fed to the first and second frequency converters by switches so that the two frequency-converted signals are subtracted or added in phase or in opposite phase to clear the noise (or crosstalk component), which is caused by the crosstalk between the tracks.
摘要:
A semiconductor integrated circuit device comprising a logic circuit which is constituted by using tri-state IIL gates. The tri-state IIL gates are particularly arranged to have first and second inputs. If the second input has a first level, the circuit will operate as a normal IIL circuit to provide high and low outputs in response to the first input. However, if the second input has a second level, the circuit will provide a floating output regardless of the first input. The transistors of the IIL circuit can be formed in an island in the substrate, with the potential of the island serving as the second input. In a preferred arrangement, the first level of the second input can be obtained by grounding the island while the second level is obtained by disconnecting the island from ground. These tri-state IIL gates are particularly advantageous to form a transfer gate for an IIL memory similar to the transfer gates used for MOS memories. They can also be used for forming various other logic gate arrangements.
摘要:
In a synchronizing detector circuit which has at least two differential transistors, a pair of constant current transistors are connected to the differential transistors, and an output transistor is connected to the junctures between the differential and constant current transistors and to a filter circuit for detection. A synchronizing detector circuit comprises a compensating circuit incorporated between the junctures and the filter circuit and includes a constant current absorbing circuit, so as to prevent an offset output voltage of the filter circuit due to noise.
摘要:
A discriminator apparatus for a television multivoice system comprises a mixer for mixing a program identifying signal with a reference signal thereby to produce a differential beat signal. A reference signal generator includes a signal source of an original frequency, and a frequency converter for converting the original frequency to the reference frequency which is close to the frequency of the program identifying signal and so selected that the frequency of the differential beat signal is lower than the lowest audible frequency. A low-pass filter is employed for extracting the differential beat signal. Need for expensive mechanical filters of a narrow fractional bandwidth is thereby eliminated.