-
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.
-
公开(公告)号：JPH05207308A
公开(公告)日：1993-08-13
申请号：JP19711892
申请日：1992-07-23
Applicant: ST MICROELECTRONICS SRL
Inventor： MERLO MAURO , GORNATI SILVANO
Abstract: PURPOSE: To make the special adjustment of parts unnecessary at the time of making an actual yoke current flowing to the deflection yoke 6 of a horizontal deflection stage coincident with an ideal signal. CONSTITUTION: A deviation amplifier 16 compares an actual yoke current ig detected by means of an operational amplifier 12 with an ideal signal S4 generated from signal generating means 13-15 and, when the amplifier 16 generates a deviation signal, a transistor 17 changes the voltage of a control capacitor 7 and, in its tern, a deflection yoke 6 so that the current ig can become coincident with the ideal signal S4 .
-
公开(公告)号：DE69222495T2
公开(公告)日：1998-02-05
申请号：DE69222495
申请日：1992-07-15
Applicant: ST MICROELECTRONICS SRL
Inventor： MERLO MAURO , GORNATI SILVANO
Abstract: A device (10) for controlling the linearity of a horizontal deflection stage (1) comprising a deflection yoke (6) supplied with a yoke current (ig) controlled by a switch (2, 4), and series connected to a capacitor (7) for varying the yoke voltage according to the phase of the yoke current (ig); the device (10) comprising a circuit (11, 12) for detecting and generating a real signal proportional to the yoke current (ig); a ramp generator (13-15) for generating an ideal ramp signal having rising portions defining a given S-shaped waveform; and an error amplifier (16) for receiving the real and ideal ramp signals and generating an error signal for driving a power transistor (17) having its emitter and collector terminals connected parallel to the capacitor (7), for modifying the voltage in the capacitor so that the yoke current assumes the required waveform.
-
公开(公告)号：DE69838973D1
公开(公告)日：2008-02-21
申请号：DE69838973
申请日：1998-05-29
Applicant: ST MICROELECTRONICS SRL
Inventor： GERVASI LUIGI , LECCE SERGIO , COCETTA FRANCO , MERLO MAURO
Abstract: The tensioning apparatus is destined for use with silk screens essentially constituted by a flat frame (10) on which a screen material (2) or sieve is arranged. It comprises means for fixing the screen material (2) peripherally on the frame (10), and means for tensioning, associated to the frame (10), which operate between the frame (10) and the screen material (2) in order to tension the screen material (2).
-
公开(公告)号：DE69518977T2
公开(公告)日：2001-03-22
申请号：DE69518977
申请日：1995-06-30
Applicant: ST MICROELECTRONICS SRL
Inventor： MERLO MAURO , COCETTA FRANCO , MARCHIO FABIO , GRASSO MASSIMO , MURARI BRUNO
Abstract: A reference voltage generator having a dual slope temperature characteristic, for use in an automotive alternator voltage regulator, comprises a bandgap circuit (R1,R2,R3,R4) which generates a voltage (A) having a thermal drift coefficient of zero and a voltage (B) having a non-zero thermal drift coefficient. These voltages are applied to a voltage divider (R5,R6) and a voltage-follower type of circuit (OPA1). A unidirectional conduction amplifier circuit (OPA2) has an input terminal connected to an intermediate point (C) on the voltage divider. A second voltage divider (R7,R8) is connected between the output terminals of the voltage-follower circuit (D) and the amplifier circuit (E). An intermediate node (F) of the second voltage divider is coupled to an output terminal (VREF) of the generator.
-
Patent Agency Ranking
公开(公告)号：DE69518977D1
公开(公告)日：2000-11-02
申请号：DE69518977
申请日：1995-06-30
Applicant: ST MICROELECTRONICS SRL
Inventor： MERLO MAURO , COCETTA FRANCO , MARCHIO FABIO , GRASSO MASSIMO , MURARI BRUNO
Abstract: A reference voltage generator having a dual slope temperature characteristic, for use in an automotive alternator voltage regulator, comprises a bandgap circuit (R1,R2,R3,R4) which generates a voltage (A) having a thermal drift coefficient of zero and a voltage (B) having a non-zero thermal drift coefficient. These voltages are applied to a voltage divider (R5,R6) and a voltage-follower type of circuit (OPA1). A unidirectional conduction amplifier circuit (OPA2) has an input terminal connected to an intermediate point (C) on the voltage divider. A second voltage divider (R7,R8) is connected between the output terminals of the voltage-follower circuit (D) and the amplifier circuit (E). An intermediate node (F) of the second voltage divider is coupled to an output terminal (VREF) of the generator.
-
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.
-
公开(公告)号：IT1250203B
公开(公告)日：1995-04-03
申请号：ITTO910579
申请日：1991-07-23
Applicant: ST MICROELECTRONICS SRL
Inventor： MERLO MAURO , GORNATI SILVANO
Abstract: A device (10) for controlling the linearity of a horizontal deflection stage (1) comprising a deflection yoke (6) supplied with a yoke current (ig) controlled by a switch (2, 4), and series connected to a capacitor (7) for varying the yoke voltage according to the phase of the yoke current (ig); the device (10) comprising a circuit (11, 12) for detecting and generating a real signal proportional to the yoke current (ig); a ramp generator (13-15) for generating an ideal ramp signal having rising portions defining a given S-shaped waveform; and an error amplifier (16) for receiving the real and ideal ramp signals and generating an error signal for driving a power transistor (17) having its emitter and collector terminals connected parallel to the capacitor (7), for modifying the voltage in the capacitor so that the yoke current assumes the required waveform.
-
公开(公告)号：DE69838973T2
公开(公告)日：2009-01-02
申请号：DE69838973
申请日：1998-05-29
Applicant: ST MICROELECTRONICS SRL
Inventor： GERVASI LUIGI , LECCE SERGIO , COCETTA FRANCO , MERLO MAURO
Abstract: The tensioning apparatus is destined for use with silk screens essentially constituted by a flat frame (10) on which a screen material (2) or sieve is arranged. It comprises means for fixing the screen material (2) peripherally on the frame (10), and means for tensioning, associated to the frame (10), which operate between the frame (10) and the screen material (2) in order to tension the screen material (2).
-
公开(公告)号：DE69222495D1
公开(公告)日：1997-11-06
申请号：DE69222495
申请日：1992-07-15
Applicant: ST MICROELECTRONICS SRL
Inventor： MERLO MAURO , GORNATI SILVANO
Abstract: A device (10) for controlling the linearity of a horizontal deflection stage (1) comprising a deflection yoke (6) supplied with a yoke current (ig) controlled by a switch (2, 4), and series connected to a capacitor (7) for varying the yoke voltage according to the phase of the yoke current (ig); the device (10) comprising a circuit (11, 12) for detecting and generating a real signal proportional to the yoke current (ig); a ramp generator (13-15) for generating an ideal ramp signal having rising portions defining a given S-shaped waveform; and an error amplifier (16) for receiving the real and ideal ramp signals and generating an error signal for driving a power transistor (17) having its emitter and collector terminals connected parallel to the capacitor (7), for modifying the voltage in the capacitor so that the yoke current assumes the required waveform.
-
-
-
-
-
-
-
-
-
Search Results
14
records
(took 0.01 seconds)
