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    METHOD FOR CANCELING COMMON MODE CURRENT SIGNAL AND TRANSCONDUCTOR SYSTEM USING SUCH METHOP
    1.
    发明专利
    METHOD FOR CANCELING COMMON MODE CURRENT SIGNAL AND TRANSCONDUCTOR SYSTEM USING SUCH METHOP 失效

    公开(公告)号：JPH0846456A

    公开(公告)日：1996-02-16

    申请号：JP16656895

    申请日：1995-06-30

    Applicant: ST MICROELECTRONICS SRL

    Inventor： REZZI FRANCESCO ,  BASCHIROTTO ANDREA ,  CASTELLO RINALDO

    IPC: H03F3/45

    Abstract: PURPOSE: To highly reduce common mode current signals in an output terminal. CONSTITUTION: The method for canceling common mode current signals at the second transconductor circuit C2 output terminals OP1 and OM1, which are provided with the same differential mode transconductance value as the second common mode conductance value is provided with a first transconductor circuit C1, and a second transconductor circuit C2. The circuit C1 is provided with the same differential mode transconductance value as the first common mode transconductance value. The circuit C2 is provided with the common mode transconductance whose coefficient is almost the same as the second value and whose code is opposite in parallel to the first transconductor circuit C1.

    TRANSCONDUCTOR CIRCUIT AND ACTIVE FILTER
    3.
    发明专利
    TRANSCONDUCTOR CIRCUIT AND ACTIVE FILTER 失效

    公开(公告)号：JPH0846457A

    公开(公告)日：1996-02-16

    申请号：JP16656995

    申请日：1995-06-30

    Applicant: ST MICROELECTRONICS SRL

    Inventor： REZZI FRANCESCO ,  BASCHIROTTO ANDREA ,  CASTELLO RINALDO

    IPC: H03F3/34 ,  H03F3/45 ,  H03H11/04

    Abstract: PURPOSE: To suppress distortion generated by a transconductance by suppressing fluctuation of a load current and voltage. CONSTITUTION: The transconductor circuit consists of two input transistors M1 and M2 that are provided with a differential input and single output and the primary induction terminals D1, S1, D2 and S2 connected to one another so as to reduce the fluctuation of load current and voltage and at the same time to suppress the distortion generated by each of the transconductances as well.

    7.
    发明专利
    未知

    公开(公告)号：DE69631772D1

    公开(公告)日：2004-04-08

    申请号：DE69631772

    申请日：1996-12-04

    Applicant: ST MICROELECTRONICS SRL

    Inventor： REZZI FRANCESCO ,  CASTELLO RINALDO ,  CAZZANIGA MARCO ,  BIETTI IVAN

    IPC: H03H11/04

    Abstract: The invention relates to an elementary biquadratic cell for programmable time-continous analog filters, which is placed between a first supply voltage reference (Vdd) and a second voltage reference (GND) and is of a type having at least one pair of input terminals (I31,I31') and first (O31,O31') and second (O32,O32') pairs of output terminals, and having a pair of half-cells (31,31'), which half-cells are structurally identical with each other and each comprised of at least a first transistor (T31,T31') placed between the first (Vdd) and the second (GND) voltage reference and having a base terminal connected to a respective one of the input terminals (I31,I31'). Each half-cell (31,31') further comprises second (T32,T32') and third (T33,T33') transistors placed between the first (Vdd) and second (GND) voltage references, the second transistor (T32,T32') having a base terminal connected to the first output terminal (O31,O31') of the first pair of output terminals and a collector terminal connected to the second output terminal (O32,O32') of the second pair of output terminals, and the third transistor (T33,T33') having an emitter terminal connected to the first output terminal (O31,O31') of the first pair of output terminals ad a base terminal connected to the second output terminal (O32',O32) of the second pair of output terminals of the other half-cell.

    8.
    发明专利
    未知

    公开(公告)号：DE69428888T2

    公开(公告)日：2002-07-04

    申请号：DE69428888

    申请日：1994-06-30

    Applicant: ST MICROELECTRONICS SRL

    Inventor： REZZI FRANCESCO ,  BASCHIROTTO ANDREA ,  CASTELLO RINALDO

    IPC: H03F3/45

    Abstract: The transconductor system in accordance with the present invention is the type comprising a first transconductor circuit (C1) having differential mode transconductance equal to a first value and common mode transconductance equal to a second value and is characterised in that it comprises a second transconductor circuit (C2) connected in parallel with said transconductor circuit (C1) having common mode transconductance substantially equal in modulus to said second value and of opposite sign. In this manner the common mode current signal at the output is greatly reduced.

    9.
    发明专利
    未知

    公开(公告)号：DE69428888D1

    公开(公告)日：2001-12-06

    申请号：DE69428888

    申请日：1994-06-30

    Applicant: ST MICROELECTRONICS SRL

    Inventor： REZZI FRANCESCO ,  BASCHIROTTO ANDREA ,  CASTELLO RINALDO

    IPC: H03F3/45

    Abstract: The transconductor system in accordance with the present invention is the type comprising a first transconductor circuit (C1) having differential mode transconductance equal to a first value and common mode transconductance equal to a second value and is characterised in that it comprises a second transconductor circuit (C2) connected in parallel with said transconductor circuit (C1) having common mode transconductance substantially equal in modulus to said second value and of opposite sign. In this manner the common mode current signal at the output is greatly reduced.

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