公开(公告)号：JPH0879006A

公开(公告)日：1996-03-22

申请号：JP20722395

申请日：1995-08-14

Applicant: ST MICROELECTRONICS SRL

Inventor： BRIANTI FRANCESCO ,  ALINI ROBERTO ,  PISATI VALERIO ,  GADDUCCI PAOLO

IPC: H03H11/04

Abstract: PROBLEM TO BE SOLVED: To constitute a fourth cell which operates with a low supply power, does not require any floating capacitance, and has a low capacitance load at its input terminal. SOLUTION: A high-pass filter constituted of a current generating circuit 29 which is particularly used for high frequencies, has at least each one of input terminal IN and output terminal OUT, between which a transfer function (Fdt) is formed, incorporates serially arranged transconductance stages 2-5, is connected between a pair of stages 2 and 3 of a fourth cell 18 and a reference voltage (GND), and generates variable currents iK1 and iK2 . The circuit 29 makes the introduction of a programmable zero to the transfer function (Fdt) of the filter 20 possible.

公开(公告)号：DE69427479T2

公开(公告)日：2002-01-17

申请号：DE69427479

申请日：1994-11-30

Applicant: ST MICROELECTRONICS SRL

Inventor： BRIANTI FRANCESCO ,  PISATI VALERIO ,  ALINI ROBERTO ,  MOLONEY DAVID

IPC: G05F3/26

公开(公告)号：DE69529397D1

公开(公告)日：2003-02-20

申请号：DE69529397

申请日：1995-02-22

Applicant: ST MICROELECTRONICS SRL

Inventor： ALINI ROBERTO ,  BRIANTI FRANCESCO ,  PISATI VALERIO ,  DEMICHELI MARCO

IPC: H03H11/04 ,  H03H15/00 ,  H03H17/00 ,  H03M13/23 ,  H03H1/00

公开(公告)号：DE69427479D1

公开(公告)日：2001-07-19

申请号：DE69427479

申请日：1994-11-30

Applicant: ST MICROELECTRONICS SRL

Inventor： BRIANTI FRANCESCO ,  PISATI VALERIO ,  ALINI ROBERTO ,  MOLONEY DAVID

IPC: G05F3/26

公开(公告)号：DE69530838D1

公开(公告)日：2003-06-26

申请号：DE69530838

申请日：1995-06-30

Applicant: ST MICROELECTRONICS SRL

Inventor： GADDUCCI PAOLO ,  MOLONEY DAVID ,  BRIANTI FRANCESCO ,  PISATI VALERIO

IPC: G06F7/02

Abstract: The invention relates to a basic cell (11) for comparing a first and a second digital signal (A, B), of the type having at least a first and a second input (I1, I2) and a first and a second output (O3, O4) and comprising at least one logic gate (14) receiving digital signals (A, B) at a first and a second signal input (IS1, IS2), and which comprises at least a first and a second controlled switch (P1, P2) inserted in parallel with each other between the output terminal of the logic gate (14) and the second output (O4) from the cell (11), the first switch (P1) being also connected between the first input (I1) and the first output (O3) of the cell (11) and the second switch (P2) being also connected between the second input (I2) and the second output (O4) of the cell (11). The invention also relates to a digital comparator (9) comprising a plurality of basic cells according to the invention.

公开(公告)号：DE69431656D1

公开(公告)日：2002-12-12

申请号：DE69431656

申请日：1994-08-12

Applicant: ST MICROELECTRONICS SRL

Inventor： BRIANTI FRANCESCO ,  ALINI ROBERTO ,  PISATI VALERIO ,  GADDUCCI PAOLO

IPC: H03H11/04 ,  H03H1/00

Abstract: A high-pass filter in particular for high-frequency applications and of the type comprising at least one input terminal (IN) and at least one output terminal (OUT) between which is defined a transfer function (FdT) and is inserted a biquadratic cell (18) incorporating a series of transconductance stages (2, 3, 4, 5) comprises a generator circuit (29) of variable currents (iK1, iK2) connected between a pair of stages (2, 3) of the biquadratic cell (18) and a voltage reference (GND). Said generator allows introduction of programmable zeroes in the transfer function (FdT) of the filter (20).