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公开(公告)号：DE3886649T2
公开(公告)日：1994-04-21
申请号：DE3886649
申请日：1988-09-28
Applicant: SGS THOMSON MICROELECTRONICS
Inventor： BOTTI EDOARDO , TORAZZINA ALDO
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公开(公告)号：FR2618274A1
公开(公告)日：1989-01-20
申请号：FR8809490
申请日：1988-07-12
Applicant: SGS THOMSON MICROELECTRONICS
Inventor： BOTTI EDOARDO , TORAZZINA ALDO
IPC: H01L27/04 , H01L21/822 , H03F3/68
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公开(公告)号：FR2614483A1
公开(公告)日：1988-10-28
申请号：FR8805244
申请日：1988-04-20
Applicant: SGS THOMSON MICROELECTRONICS
Inventor： BOTTI EDOARDO , TORAZZINA ALDO , STEFANI FABRIZIO
Abstract: This amplifier stage has saturation control and high dynamics. The stage comprises a pair of input current sources connected in series between a pair of reference voltage lines, a pair of output transistors, connected between the pair of reference voltage lines and defining an intermediate output terminal and a driving circuit comprising active elements and interposed between the input current sources and the output transistors. Saturation control is achieved through a pair of control circuits, one for each output transistor, comprising each a resistor interposed between the driving circuit and the respective output transistor so as to preset the balance saturation gain of the respective output transistor, and a transistor connected with its base to the driving circuit and with its collector and emitter between the output of the amplifier stage and the intermediate connection point between the input current sources, so as to define a negative feedback reducing imbalances existing between the currents fed by the input current sources, and therefore prevent high saturation levels of the transistors.
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公开(公告)号：DE3634979C2
公开(公告)日：1995-12-07
申请号：DE3634979
申请日：1986-10-14
Applicant: SGS THOMSON MICROELECTRONICS
Inventor： BOTTI EDOARDO , TORAZZINA ALDO , MURARI BRUNO
Abstract: A device for increasing the power output of a low-tension operated amplifier which is connected to a standard impedance loudspeaker and is powered at a voltage level which, in the presence of an audio signal, consists of the DC operating voltage for the set and an overlapping variable voltage which is proportional to the audio signal input to the amplifier. Thus, a high dynamic range is afforded for the output signal from the amplifer directed to the loudspeaker.
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公开(公告)号：DE3886649D1
公开(公告)日：1994-02-10
申请号：DE3886649
申请日：1988-09-28
Applicant: SGS THOMSON MICROELECTRONICS
Inventor： BOTTI EDOARDO , TORAZZINA ALDO
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Patent Agency Ranking
公开(公告)号：IT1230895B
公开(公告)日：1991-11-08
申请号：IT2095089
申请日：1989-06-22
Applicant: SGS THOMSON MICROELECTRONICS
Inventor： BOTTI EDOARDO , TORAZZINA ALDO
IPC: H01L21/331 , H01L21/8222 , H01L27/06 , H01L29/06 , H01L29/10 , H01L29/73 , H01L29/732 , H01L
Abstract: An integratable power transistor with optimization of direct secondary breakdown phenomena which comprises a plurality of elementary transistors which are arranged side by side and comprise a plurality of cells (30), each of which is formed by an emitter region (16) surrounded by base (17) and collector (18) regions, with the emitter regions (16) arranged physically separated. According to the invention, the base regions (17) are also arranged physically separated and are mutually connected by resistive elements (27).
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公开(公告)号：IT8922226A1
公开(公告)日：1991-05-01
申请号：IT2222689
申请日：1989-10-31
Applicant: SGS THOMSON MICROELECTRONICS S R L
Inventor： TORAZZINA ALDO , MURARI BRUNO
IPC: H03F20060101 , H03F1/02 , H03G3/20 , H03G3/30
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公开(公告)号：IT8922226D0
公开(公告)日：1989-10-31
申请号：IT2222689
申请日：1989-10-31
Applicant: SGS THOMSON MICROELECTRONICS
Inventor： TORAZZINA ALDO , MURARI BRUNO
Abstract: A first non-inverting amplifier unit and a second inverting amplifier unit (10, 12, Fig. 3) are driven by a single input signal (Vin); their outputs are connected across a load (22), directly and via a series capacitor (24), respectively. A circuit 16, 26, 32, 36, 40) disables the second amplifier (12) when the input signal (Vin) is lower than a preset threshold level.
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公开(公告)号：DE3812396A1
公开(公告)日：1988-11-10
申请号：DE3812396
申请日：1988-04-14
Applicant: SGS THOMSON MICROELECTRONICS
Inventor： BOTTI EDOARDO , TORAZZINA ALDO , STEFANI FABRIZIO
Abstract: This amplifier stage has saturation control and high dynamics. The stage comprises a pair of input current sources connected in series between a pair of reference voltage lines, a pair of output transistors, connected between the pair of reference voltage lines and defining an intermediate output terminal and a driving circuit comprising active elements and interposed between the input current sources and the output transistors. Saturation control is achieved through a pair of control circuits, one for each output transistor, comprising each a resistor interposed between the driving circuit and the respective output transistor so as to preset the balance saturation gain of the respective output transistor, and a transistor connected with its base to the driving circuit and with its collector and emitter between the output of the amplifier stage and the intermediate connection point between the input current sources, so as to define a negative feedback reducing imbalances existing between the currents fed by the input current sources, and therefore prevent high saturation levels of the transistors.
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公开(公告)号：DE68918227D1
公开(公告)日：1994-10-20
申请号：DE68918227
申请日：1989-10-30
Applicant: SGS THOMSON MICROELECTRONICS
Inventor： TORAZZINA ALDO
Abstract: An integrated audio amplifier has "mute" and "stand-by" states through which it passes when passing between normal operation and a cut-off state. The amplifier comprises an amplifier circuit (OP) and three threshold comparators (K1, K2, K3) each having an input terminal connected to a common circuit node (P). As a function of the potential values at the circuit node (P), the comparators (K1, K2, K3) regulate the biasing of the amplifier circuit and the transduction of signals.
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