Processing

Please wait...

Settings

Settings

Goto Application

1. WO2020139593 - LOOP FILTER FOR A PHASE-LOCKED LOOP

Publication Number WO/2020/139593
Publication Date 02.07.2020
International Application No. PCT/US2019/066467
International Filing Date 16.12.2019
IPC
H03L 7/06 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
LAUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
7Automatic control of frequency or phase; Synchronisation
06using a reference signal applied to a frequency- or phase-locked loop
H03L 7/085 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
LAUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
7Automatic control of frequency or phase; Synchronisation
06using a reference signal applied to a frequency- or phase-locked loop
08Details of the phase-locked loop
085concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
CPC
H03L 2207/06
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
LAUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
2207Indexing scheme relating to automatic control of frequency or phase and to synchronisation
06Phase locked loops with a controlled oscillator having at least two frequency control terminals
H03L 7/0891
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
LAUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
7Automatic control of frequency or phase; Synchronisation
06using a reference signal applied to a frequency- or phase-locked loop
08Details of the phase-locked loop
085concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
089the phase or frequency detector generating up-down pulses
0891the up-down pulses controlling source and sink current generators, e.g. a charge pump
H03L 7/093
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
LAUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
7Automatic control of frequency or phase; Synchronisation
06using a reference signal applied to a frequency- or phase-locked loop
08Details of the phase-locked loop
085concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
093using special filtering or amplification characteristics in the loop
H03L 7/099
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
LAUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
7Automatic control of frequency or phase; Synchronisation
06using a reference signal applied to a frequency- or phase-locked loop
08Details of the phase-locked loop
099concerning mainly the controlled oscillator of the loop
H03L 7/18
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
LAUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
7Automatic control of frequency or phase; Synchronisation
06using a reference signal applied to a frequency- or phase-locked loop
16Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
18using a frequency divider or counter in the loop
Applicants
  • TEXAS INSTRUMENTS INCORPORATED [US]/[US]
  • TEXAS INSTRUMENTS JAPAN LIMITED [JP]/[JP] (JP)
Inventors
  • NAGARAJ, Krishnaswamy
  • FU, Wei
Agents
  • GRAHAM, Brian
Common Representative
  • TEXAS INSTRUMENTS INCORPORATED
Priority Data
16/231,56823.12.2018US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) LOOP FILTER FOR A PHASE-LOCKED LOOP
(FR) FILTRE À BOUCLE POUR BOUCLE À VERROUILLAGE DE PHASE
Abstract
(EN)
A circuit includes a first filter (402), a plurality of binary -weighted capacitors (C1, C2, Cn), and a current source device (Ml). The circuit also includes a first plurality of switches (SW3). Each of the first plurality of switches (SW3) is connected to a separate capacitor of the plurality of binary- weighted capacitors (C1, C2, Cn). The first plurality of switches (SW3) are connected together, and the first plurality of switches (C1, C2, Cn) are not connected to the first filter. A second plurality of switches (SW2) is also included, and each of the second plurality of switches (SW2) is connected to a separate capacitor of the plurality of binary-weighted capacitors (C1, C2, Cn) and to the first filter (402) and to a control input of the current source device (M1). The first plurality of switches (SW3) is not connected to the control input.
(FR)
Un circuit comprend un premier filtre (402), une pluralité de condensateurs à pondération binaire (C1, C2, Cn), et un dispositif source de courant (Ml). Le circuit comprend également une première pluralité de commutateurs (SW3). Chaque commutateur parmi la première pluralité de commutateurs (SW3) est connecté à un condensateur séparé de la pluralité de condensateurs à pondération binaire (C1, C2, Cn). Les commutateurs de la première pluralité de commutateurs (SW3) sont connectés les uns aux autres, et les commutateurs de la première pluralité de commutateurs (C1, C2, Cn) ne sont pas connectés au premier filtre. Une seconde pluralité de commutateurs (SW2) est également incluse, et chaque commutateur parmi la seconde pluralité de commutateurs (SW2) est connecté à un condensateur séparé de la pluralité de condensateurs à pondération binaire (C1, C2, Cn) et au premier filtre (402) et à une entrée de commande du dispositif source de courant (M1). La première pluralité de commutateurs (SW3) n'est pas connectée à l'entrée de commande.
Also published as
Latest bibliographic data on file with the International Bureau