PURPOSE:To display a character or a symbol to a nondisplay part by displaying an optional desired picture signal to an idle space caused when a 2nd video signal is displayed on a small screen so as to synthesize a synthesized pattern CONSTITUTION:A vertical drive circuit 4 and 1st and 2nd horizontal drive circuits 3, 3' at the display of an HD system signal scan the vertical and horizontal part of a display section 2 sequentially and a video signal inputted to a terminal 100 is displayed on a main display section M and an auxiliary display section A The aspect ratio is 16:9 and the HD system video signal inputted to the terminal 100 is displayed correctly The vertical drive circuit 4 and the 1st horizontal drive circuit 3 display a video signal by the NTSC system on the main display section M at the display of the signal of the NTSC system and the 2nd horizontal drive circuit 3' displays a character signal on the auxiliary display section A The aspect ratio of the main display section M is 4:3 and the video signal by the NTSC system inputted to the terminal 100 is displayed correctly Thus, a character or a symbol is displayed on a nondisplay part

Synthesis pattern display device, electronic view finder formed thereby and plane type television receiver

An ex-core nuclear instrumentation system in which the width of measurable neutron detector current can be accurately widened is obtained. In order to output the condition of neutron flux in operation by performing arithmetic processing of a current value measured by a neutron detector by using a detector signal processing circuit, the detector signal processing circuit includes a current/voltage conversion unit which converts the current value converted by the neutron detector into a voltage value corresponding to the current value; and a variable gain amplification unit which has an operational amplifier having a resistance circuit for corresponding to current levels, the resistance circuit being capable of selecting a gain, and a D/A converter that adjusts the gain, and amplifies the voltage value converted by the current/voltage conversion unit.

Ex-core nuclear instrumentation system

A synchronization control apparatus for driving a display module in an interlacing scan mode includes: a delay circuit for delaying an input vertical sync (IVS) signal to generate a delayed signal; and a multiplexer coupled to the delay circuit for selecting one of the IVS signal and the delayed signal according to an odd/even field indication signal to generate an output vertical sync (OVS) signal.

Synchronization control apparatus and method

PURPOSE: To always accurately separate luminance signals and chromaticity signals from each other by constituting three line separation filters which can adapt themselves to vertical luminance changes and selecting an output signal by comparing the signal of the present line with the signals of the preceding and succeeding adjacent lines. CONSTITUTION: Composite video signals CV are successively outputted with one-line delay by means of one-line delaying devices 11a and 11b and the signals CV and the output signal of the delaying device 11b are respectively inverted by means of inverter gates 12a and 12b. The output signals of the gates 12a and 12b are respectively impressed upon the terminals (a) and (c) of a selector 18 after the output signal of the delaying device 11a is added to the signals at adders 13a and 13b. DC components are removed from the signals outputted from the selector 18 while the signals are passed through a band-pass filter 19 and only chromaticity signals C are separately outputted from the filter 19. In addition, since a subtractor 16c subtracts the chromaticity signals C form the output signal of the delaying device 11a, only luminance signals are separately outputted from the subtractor 16c.

Brightness/chromaticity separating circuit of composite picture signal

A voltage controlled oscillator includes a plurality of serially connected composite gain stages. A composite gain stage includes a transconductance stage and a transimpedance stage. The transconductance stage has first and second current paths from a first power supply voltage terminal to a second power supply voltage terminal. A first variable resistance is coupled between the first and second current paths. The transimpedance stage has a first inverter and a second inverter. The first inverter has an input terminal coupled to the output of the first current path and an output terminal. The second inverter has an input terminal coupled to the output of the second current path, and an output terminal. A second variable resistance is coupled between the input terminal and the output terminal of the first inverter, and a third variable resistance is coupled between the input terminal and the output terminal of the second inverter.

Phase locked loop circuit having a voltage controlled oscillator with improved bandwidth

PROBLEM TO BE SOLVED: To provide a variable gain amplifier in which an operating frequency is wide, a gain adjusting scope is wide and besides a power consumption is low. SOLUTION: A gm cell 11 converts an input signal voltage Vi to be supplied to an input terminal 13 into a corresponding output current. A current voltage conversion circuit 12 contains a function of converting an output current of the gm cell 11 into a voltage, and of adjusting this conversion gain. Namely, the current voltage conversion circuit 12 comprises a calculation amplifier 14 and a variable resistor 15 which is connected between an input terminal and an output terminal of this calculation amplifier 14 so as to set any resistance value.

Variable gain amplifier

PURPOSE:To select plural color signals adaptively by means of a noncorrelation detection signal by revising the use of a video signal obtained from three adjacent scanning lines so as to limit the band in the vertical direction. CONSTITUTION:1st and 2nd delay elements 3, 4 having a delay time of one horizontal period are connected in cascade, the 1st color signal obtained from the 1st subtracter 6 receiving the input/output signal of the 1st delay element 3 and a 2nd color signal obtained from the 2nd subtracter 5 receiving the input/ output signal of the 2nd delay element 4 are fed to an adder 9 to generate the 3rd color signal. Then the center scanning line in the three adjacent scanning lines and the noncorrelation of the scanning lines adjacent upper or lower the scanning line are detected. Through the constitution above, in selecting any of the 1st-3rd color signals by the noncorrelation detection signal, the color signal is selected, which is obtained from a comb-line filter with respect to the scanning line having correlation with the center scanning line in the upper/ lower adjacent scanning lines.

Yc separation circuit

PURPOSE:To display a television picture on a common matrix type display even to a television input signal, whose standard is different, by obtaining an area to correspond to the aspect ratio and effective scanning line number of the television input signal as a display area and executing scan even during the horizontal and vertical retrace line periods of the television input signal. CONSTITUTION:Even when a television input signal Vi is not suited for the scanning structure of a matrix type display 1, the area to correspond to the aspect ratio and effective scanning line number of the television input signal Vi is obtained as the display area. Then, a video signal is switched and the scanning is executed not only during the scanning period of the television input signal Vi but also during the horizontal and vertical retrace line periods. Thus, the scanning structure of the display 1 is shared and a picture can be displayed on a same screen. Further, a balnk part, which is generated when the aspect ratios of the display 1 and television input signal Vi are different, can be utilized for the display of the other picture.

Television picture display device

PURPOSE:To decrease dot disturbance or cross color disturbance by employing a method in which the frequency band limitation as to the time base is executed by means of an output from a moving detection circuit or a method in which said limitation is executed in the horizontal and the vertical directions. CONSTITUTION:A first and a second color separation means 10A, 10B are provided and either of the chrominance signals extracted and separated by the means 10A, 10B are selected by using a signal obtained from the moving detection means 20 that decides the correlation in the time-base direction between composite color video signals. The first color separation means 10A, separates the chrominance signal from a composite color video signal by using the inter- frame correction, while the second color separation means 10B separated the chrominance signal from the composite color video signal by using the correlation in the horizontal direction and the vertical direction in a field.

Y/c separator circuit

PURPOSE:To obtain a vertical synchronizing signalo normalized by a correct timing in any case by selecting one of plural delayed normalized vertical synchronizing signals from a measured phase and a change between frames of the measured phase. CONSTITUTION:A D-FF11 measures a phase between a vertical synchronizing signal V and a horizontal synchronizing signal H. Then a phase selected by a selector 12 is delayed by one frame at D-FFs 13, 14 and a subtractor 15 and sbsolute value device 16 obtain an inter-frame difference of the phase. A discrimination circuit 17 discriminates the phase and the quantity between frames of the phase and a signal selected by the selector 8 with selection signals SEL.1 discriminated to be small is fed to an output terminal as a normalized signal V in a correct timing. Thus, a vertical synchronizing signal normalized in the correct timing is obtained from the signal subjected to fluctuation of equalizing pulse, S/N, APL, and fluctuation of excess reply of an AFC circuit and a PLL circuit and a time axis fluctuation of a VTR.

Vertical synchronizing signal normalizing device

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