公开(公告)号：EP3796551A1

公开(公告)日：2021-03-24

申请号：EP20196153.9

申请日：2020-09-15

Applicant: STMicroelectronics S.r.l.

Inventor： MAHDIPOUR PIRBAZARI, Mahmoud ,  MAZZANTI, Andrea ,  PALLOTTA, Andrea

IPC: H03B19/14

Abstract: A circuit for tripling frequency configured to receive an input voltage (V in ) having a sinusoidal shape and a base frequency. The circuit has a first and a second transistor pair (Q1-Q4) that are cross-coupled and a trans-characteristic f(V in ) approximating a polynomial nominal trans-characteristic (1) : f V in = 3 A V in − 4 A 3 V in 3 g m wherein g m is a transconductance of transistors of the first and second transistor pairs.

公开(公告)号：EP3185415B1

公开(公告)日：2018-07-25

申请号：EP16172129.5

申请日：2016-05-31

Applicant: STMicroelectronics S.r.l.

Inventor： SAUTTO, Marco ,  QUAGLIA, Fabio ,  RICOTTI, Giulio ,  MAZZANTI, Andrea

IPC: H03F3/00 ,  H03F3/45 ,  H03F3/217 ,  H03G1/00

CPC classification number: H03G1/0094 ,  H03F3/005 ,  H03F3/2175 ,  H03F3/45 ,  H03F3/45264 ,  H03F2200/312 ,  H03F2203/45288

Abstract: In an embodiment, a programmable-gain amplifier includes: two complementary cross-coupled transistor (e.g. MOS) pairs (M n-a , M n-b ; M p-a , M p-b ) mutually coupled with each transistor in one pair (M n-a resp. M n-b ) having a current flow path cascaded with a current flow path of a respective one of the transistors in the other pair (M p-a resp. M p-b ) to provide first (A) and second (B) coupling points between said complementary cross-coupled transistor pairs (M n-a , M n-b ; M p-a , M p-b ); first (C a ) and second (C b ) sampling capacitors set between the first (A) and second (B) coupling points, respectively, and ground; first (10) and second (12) input stages having input terminals for receiving input signals (V in- , V in+ ) for sampling by the first (C a ) and second (C b ) sampling capacitors. Switching means (201 to 206; 301, 302) are provided for: - i) coupling the first (10) and second (12) input stages to the first (C a ) and second (C b ) sampling capacitors, whereby the input signals (V in- , V in+ ) are sampled as sampled signals (V out+ , V out- ) on said first (C a ) and second (C b ) sampling capacitors, and - ii) energizing (V dd ) the complementary cross-coupled transistor pairs (M n-a , M n-b ; M p-a , M p-b ) whereby the signals (V out+ , V out- ) sampled on the first (C a ) and second (C b ) sampling capacitors undergo negative resistance regeneration growing exponentially over time, thereby providing an exponential amplifier gain.

公开(公告)号：EP4145706A1

公开(公告)日：2023-03-08

申请号：EP22191733.9

申请日：2022-08-23

Applicant: STMicroelectronics S.r.l.

Inventor： FRANCESCHIN, Alessandro ,  MAZZANTI, Andrea ,  PALLOTTA, Andrea

IPC: H03L7/099 ,  H03B5/12

Abstract: A voltage controlled oscillator includes a series resonant circuit (2), having a resonance frequency (ω 0 ) and an active voltage driving device (3), coupled to the series resonant circuit (2) and configured to provide a driving voltage (V x ) and to have an output negative resistance (R 0 ) in an operative voltage range (V R ) at the resonance frequency (ω 0 ). The active voltage driving device (3) comprises a cross-coupled differential pair (20) having voltage supply terminals (3a, 3b) and the series resonant circuit (2) is coupled to the voltage supply terminals (3a, 3b) of the cross-coupled differential pair (20).

公开(公告)号：EP3185415A1

公开(公告)日：2017-06-28

申请号：EP16172129.5

申请日：2016-05-31

Applicant: STMicroelectronics S.r.l.

Inventor： SAUTTO, Marco ,  QUAGLIA, Fabio ,  RICOTTI, Giulio ,  MAZZANTI, Andrea

IPC: H03F3/00 ,  H03F3/45

CPC classification number: H03G1/0094 ,  H03F3/005 ,  H03F3/2175 ,  H03F3/45 ,  H03F3/45264 ,  H03F2200/312 ,  H03F2203/45288

Abstract: In an embodiment, a programmable-gain amplifier includes: two complementary cross-coupled transistor (e.g. MOS) pairs (M n-a , M n-b ; M p-a , M p-b ) mutually coupled with each transistor in one pair (M n-a resp. M n-b ) having a current flow path cascaded with a current flow path of a respective one of the transistors in the other pair (M p-a resp. M p-b ) to provide first (A) and second (B) coupling points between said complementary cross-coupled transistor pairs (M n-a , M n-b ; M p-a , M p-b ); first (C a ) and second (C b ) sampling capacitors set between the first (A) and second (B) coupling points, respectively, and ground; first (10) and second (12) input stages having input terminals for receiving input signals (V in- , V in+ ) for sampling by the first (C a ) and second (C b ) sampling capacitors. Switching means (201 to 206; 301, 302) are provided for:
- i) coupling the first (10) and second (12) input stages to the first (C a ) and second (C b ) sampling capacitors, whereby the input signals (V in- , V in+ ) are sampled as sampled signals (V out+ , V out- ) on said first (C a ) and second (C b ) sampling capacitors, and
- ii) energizing (V dd ) the complementary cross-coupled transistor pairs (M n-a , M n-b ; M p-a , M p-b ) whereby the signals (V out+ , V out- ) sampled on the first (C a ) and second (C b ) sampling capacitors undergo negative resistance regeneration growing exponentially over time, thereby providing an exponential amplifier gain.

Abstract translation: 在一个实施例中，可编程增益放大器包括：与一对中的每个晶体管（Mn-a，Mn-b; Mp-a， （Mp-a或Mp-b）中的相应一个晶体管的电流流动路径级联的电流流动路径以提供第一（A）和第二（B） 所述互补交叉耦合晶体管对（Mn-a，Mn-b; Mp-a，Mp-b）之间的耦合点; 分别在第一（A）和第二（B）耦合点之间设置的第一（Ca）和第二（Cb）采样电容器以及地; 第一（10）和第二（12）输入级具有用于接收输入信号（Vin-，Vin +）以供第一（Ca）和第二（Cb）采样电容器采样的输入端。 提供切换装置（201至206; 301,302）用于：i）将第一（10）和第二（12）输入级耦合至第一（Ca）和第二（Cb）采样电容器，由此输入信号 Vin和Vin +）在所述第一（Ca）和第二（Cb）采样电容器上被采样为采样信号（Vout +，Vout-），以及-ii）激励（Vdd）互补交叉耦合晶体管对（Mn- 由此在第一（Ca）和第二（Cb）采样电容器上采样的信号（Vout +，Vout-）经历随时间呈指数增长的负电阻再生，由此提供指数放大器增益 。