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公开(公告)号：JPH04233586A
公开(公告)日：1992-08-21
申请号：JP18060891
申请日：1991-06-26
Applicant: ST MICROELECTRONICS SRL
Inventor： GORNATI SILVANO , MERLO MAURO , ZUFFADA MAURIZIO , LIETAR LOIC
Abstract: PURPOSE: To provide an automatic device with wide operation band for varying the horizontal deflection frequency of the multi-synchronizing monitor. CONSTITUTION: This device includes an integrated circuit (2) wherein a frequency measuring circuit (3) to which an analog synchronizing signal (S1) is inputted at one input, a phase comparing circuit (14) which has two inputs (15 and 16) and to which the synchronizing signal (S1) is inputted at one input (15), a voltage-controlled oscillation circuit (12) which has a frequency depending upon an input voltage (Vc) and outputs a signal (S3) interlocking with the output (22) of the phase comparing circuit (14), and a counter (9) which has one input connected to the output (11) of the voltage-controlled oscillation circuit (12) and the other circuit connected to the output of the frequency measuring circuit (3), and also has its output (21) connected to the other input (16) of the phase comparing circuit (14) and outputted as the output signal of the integrated circuit (2) are incorporated.
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公开(公告)号：JPH03220913A
公开(公告)日：1991-09-30
申请号：JP30281290
申请日：1990-11-09
Applicant: ST MICROELECTRONICS SRL
Inventor： SACCHI FABRIZIO , LIETAR LOIC , VAI GIANFRANCO , BETTI GIORGIO
IPC: H03K3/2897 , H03K3/0233
Abstract: PURPOSE: To reduce dependency against the inclination of the input signal waveform of an output change by providing a second differential cell having one input connected to output and the other input connected to a control circuit part provided with respective outputs connected to threshold input. CONSTITUTION: A transistor T9 is provided with a base B9 which is directly connected to an output terminal OUT as input for a second differential cell 9 and a collector C9 connected to a power electrode Vc. In the other transistor T10, the base B10 is connected to ground via a current power as second input and is connected to the emitter E11 of an npn-type transistor T14. T14 is connected to become diode constitution in the device 1, and the collector C14 is directly connected to the emitter E15 of the transistor T15. Threshold input S is connected to the collector C10 of the transistor T10 in the cell 9 and a comparator 1 is provided with the circuit part 10 effective for controlling a voltage value Vs appearing on threshold input S. Thus, dependency against the inclination of the input signal waveform of the output change can be reduced.
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公开(公告)号：EP0427016B1
公开(公告)日：1997-12-29
申请号：EP90119873
申请日：1990-10-17
Applicant: ST MICROELECTRONICS SRL
Inventor： SACCHI FABRIZIO , LIETAR LOIC , VAI GIANFRANCO , BETTI GIORGIO
IPC: H03K3/2897 , H03K3/0233 , H03K3/023
CPC classification number: H03K3/02337
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公开(公告)号：DE69129880D1
公开(公告)日：1998-09-03
申请号：DE69129880
申请日：1991-06-05
Applicant: ST MICROELECTRONICS SRL
Inventor： GORNATI SILVANO , MERLO MAURO , ZUFFADA MAURIZIO , LIETAR LOIC
Abstract: A broad operational range, automatic device for the change of frequency in the horizontal deflection of multi-synchronization monitors comprises an integrated circuit (2) incorporating, a frequency meter (3) being input an analog synchronization signal (S1), a phase comparator (14) having two inputs (15,16) and in turn receiving said synchronization signal (S1) on one input (15), a voltage (Vc)-controlled oscillator (12) adapted to output a signal (S3) whose frequency is depending on said voltage (Vc) and operatively linked to an output (22) of said phase comparator (14), and a counter (9) connected with its input, on the one side, to the oscillator (12) output, and on the other side, to the meter (3) output, said counter having an output (21) connected to the other input of the phase comparator (14) also forming the integrated circuit (2) output.
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Patent Agency Ranking
公开(公告)号：DE69031863D1
公开(公告)日：1998-02-05
申请号：DE69031863
申请日：1990-10-17
Applicant: ST MICROELECTRONICS SRL
Inventor： SACCHI FABRIZIO , LIETAR LOIC , VAI GIANFRANCO , BETTI GIORGIO
IPC: H03K3/0233 , H03K3/2897 , H03K3/023
Abstract: An electronic comparator device (1) with hysteresis, being of a type which comprises a differential cell (2) having a signal input (IN), an output (OUT), and a threshold input (S), further comprises a second differential cell (9) having one input (B9) connected to said output (OUT) and the other input (B10) connected to a controlling circuit portion (10) which has an output (E11) connected to the threshold input (S) to reduce the threshold voltage value (Vs) stepwise on the first change-over of the output (OUT) of the comparator (1).
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公开(公告)号：IT1236692B
公开(公告)日：1993-03-26
申请号：IT2233589
申请日：1989-11-10
Applicant: ST MICROELECTRONICS SRL
Inventor： SACCHI FABRIZIO , LIETAR LOIC , VAI GIANFRANCO , BETTI GIORGIO
IPC: H03K3/0233 , H03K3/2897 , H03F
Abstract: An electronic comparator device (1) with hysteresis, being of a type which comprises a differential cell (2) having a signal input (IN), an output (OUT), and a threshold input (S), further comprises a second differential cell (9) having one input (B9) connected to said output (OUT) and the other input (B10) connected to a controlling circuit portion (10) which has an output (E11) connected to the threshold input (S) to reduce the threshold voltage value (Vs) stepwise on the first change-over of the output (OUT) of the comparator (1).
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公开(公告)号：DE69031863T2
公开(公告)日：1998-04-16
申请号：DE69031863
申请日：1990-10-17
Applicant: ST MICROELECTRONICS SRL
Inventor： SACCHI FABRIZIO , LIETAR LOIC , VAI GIANFRANCO , BETTI GIORGIO
IPC: H03K3/0233 , H03K3/2897 , H03K3/023
Abstract: An electronic comparator device (1) with hysteresis, being of a type which comprises a differential cell (2) having a signal input (IN), an output (OUT), and a threshold input (S), further comprises a second differential cell (9) having one input (B9) connected to said output (OUT) and the other input (B10) connected to a controlling circuit portion (10) which has an output (E11) connected to the threshold input (S) to reduce the threshold voltage value (Vs) stepwise on the first change-over of the output (OUT) of the comparator (1).
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公开(公告)号：IT1251352B
公开(公告)日：1995-05-08
申请号：IT2078490
申请日：1990-06-27
Applicant: ST MICROELECTRONICS SRL
Inventor： GORNATI SILVANO , MERLO MAURO , ZUFFADA MAURIZIO , LIETAR LOIC
Abstract: A broad operational range, automatic device for the change of frequency in the horizontal deflection of multi-synchronization monitors comprises an integrated circuit (2) incorporating, a frequency meter (3) being input an analog synchronization signal (S1), a phase comparator (14) having two inputs (15,16) and in turn receiving said synchronization signal (S1) on one input (15), a voltage (Vc)-controlled oscillator (12) adapted to output a signal (S3) whose frequency is depending on said voltage (Vc) and operatively linked to an output (22) of said phase comparator (14), and a counter (9) connected with its input, on the one side, to the oscillator (12) output, and on the other side, to the meter (3) output, said counter having an output (21) connected to the other input of the phase comparator (14) also forming the integrated circuit (2) output.
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公开(公告)号：IT9020784D0
公开(公告)日：1990-06-27
申请号：IT2078490
申请日：1990-06-27
Applicant: ST MICROELECTRONICS SRL
Inventor： GORNATI SILVANO , MERLO MAURO , ZUFFADA MAURIZIO , LIETAR LOIC
Abstract: A broad operational range, automatic device for the change of frequency in the horizontal deflection of multi-synchronization monitors comprises an integrated circuit (2) incorporating, a frequency meter (3) being input an analog synchronization signal (S1), a phase comparator (14) having two inputs (15,16) and in turn receiving said synchronization signal (S1) on one input (15), a voltage (Vc)-controlled oscillator (12) adapted to output a signal (S3) whose frequency is depending on said voltage (Vc) and operatively linked to an output (22) of said phase comparator (14), and a counter (9) connected with its input, on the one side, to the oscillator (12) output, and on the other side, to the meter (3) output, said counter having an output (21) connected to the other input of the phase comparator (14) also forming the integrated circuit (2) output.
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