公开(公告)号：US11936339B2

公开(公告)日：2024-03-19

申请号：US17894548

申请日：2022-08-24

Applicant: STMicroelectronics S.r.l.

Inventor： Alessandro Franceschin ,  Andrea Mazzanti ,  Andrea Pallotta

IPC: H03B5/12

CPC classification number: H03B5/1231 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/124

Abstract: A voltage controlled oscillator includes a series resonant circuit having a resonance frequency and an active voltage driving device coupled to the series resonant circuit. The active voltage driving device provides a driving voltage and has an output negative resistance in an operative voltage range at the resonance frequency. The active voltage driving device includes a cross-coupled differential pair having voltage supply terminals providing the driving voltage. The series resonant circuit is coupled between the voltage supply terminals of the cross-coupled differential pair.

公开(公告)号：US11658646B2

公开(公告)日：2023-05-23

申请号：US17577292

申请日：2022-01-17

Applicant: STMicroelectronics S.r.l.

Inventor： Mahmoud Mahdipour Pirbazari ,  Andrea Mazzanti ,  Andrea Pallotta

IPC: H03K5/00 ,  H03K17/60

CPC classification number: H03K5/00006 ,  H03K17/60

Abstract: In an embodiment, a circuit for tripling frequency is configured to receive an input voltage (Vin) having a sinusoidal shape and a base frequency. The circuit has a first and a second transistor pair that are cross-coupled, and a trans-characteristics f(Vin) approximating a polynomial nominal trans-characteristic given by





f
⁡

(

V

i
⁢
n


)


=


(



3
A

⁢

V

i
⁢
n



-


4

A
3


⁢

V

i
⁢
n

3



)

⁢

g
m






where A represents an amplitude of the input voltage and gm is a transconductance of transistors of the first and second transistor pairs.

公开(公告)号：US11271552B2

公开(公告)日：2022-03-08

申请号：US17025288

申请日：2020-09-18

Applicant: STMicroelectronics S.r.l.

Inventor： Mahmoud Mahdipour Pirbazari ,  Andrea Mazzanti ,  Andrea Pallotta

IPC: H03K5/00 ,  H03K17/60

Abstract: In an embodiment, a circuit for tripling frequency is configured to receive an input voltage (Vin) having a sinusoidal shape and a base frequency. The circuit has a first and a second transistor pair that are cross-coupled, and a trans-characteristics f(Vin) approximating a polynomial nominal trans-characteristic given by f ⁡ ( V in ) = ( 3 A ⁢ V in - 4 A 3 ⁢ V in 3 ) ⁢ g m where A represents an amplitude of the input voltage and gm is a transconductance of transistors of the first and second transistor pairs.

公开(公告)号：US20170338783A1

公开(公告)日：2017-11-23

申请号：US15363633

申请日：2016-11-29

Applicant: STMicroelectronics S.r.l.

Inventor： Luca Larcher ,  Andrea Pallotta

IPC: H03F3/60 ,  H03F3/213 ,  H03F1/56 ,  H03F3/195

CPC classification number: H03F3/602 ,  H03F1/565 ,  H03F3/195 ,  H03F3/211 ,  H03F3/213 ,  H03F3/265 ,  H03F3/45475 ,  H03F3/604 ,  H03F2200/405 ,  H03F2200/451 ,  H03F2200/534 ,  H03F2200/537 ,  H03F2200/541

Abstract: A distributed active transformer includes an input transformer set and an output transformer set. Active stages are coupled between a transformer in the input transformer set and a transformer in the output transformer set. The input and output transformer sets are each configured as a slab transformer. The input slab transformer includes a single primary slab and many secondary slabs. The output slab transformer includes many primary slabs and a single secondary slab.

公开(公告)号：US09667192B2

公开(公告)日：2017-05-30

申请号：US15146977

申请日：2016-05-05

Applicant: STMicroelectronics S.r.l.

Inventor： Lorenzo Iotti ,  Andrea Mazzanti ,  Andrea Pallotta ,  Francesco Svelto

IPC: H03B5/12 ,  H03B27/00 ,  H03B1/00

CPC classification number: H03B5/1206 ,  H03B1/00 ,  H03B5/1212 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/124 ,  H03B27/00 ,  H03B2200/0076

Abstract: An oscillator has an oscillator output emitting an oscillating signal. The oscillator includes oscillator cores which each have a same circuit topology. A set of configuration switches couple a selected number of oscillator cores in parallel to generate the oscillating signal. The oscillator cores are arranged with a symmetry around a central axis. The planar inductors of the oscillator cores are arranged in a petal-like pattern with the planar inductors forming the petals of the petal-like pattern. The selected coupling of the oscillator cores in made in response to a selected phase noise threshold of a modulation device which receives the oscillating signal.