公开(公告)号：US12101090B2

公开(公告)日：2024-09-24

申请号：US18311360

申请日：2023-05-03

Applicant: EM Microelectronic-Marin SA

Inventor： Jiri Nerad

IPC: H03B5/06 ,  H03B5/08 ,  H03K3/014 ,  H03K3/0231 ,  H03K3/03

CPC classification number: H03K3/0231 ,  H03B5/06 ,  H03B5/08 ,  H03K3/014 ,  H03K3/03

Abstract: The disclosure concerns an oscillator circuit (10) for a signal transmitter, the oscillator circuit (10) comprising:



a resonant circuit (12) comprising a resonant inductor (LR) and a resonant capacitor (CR) parallel to the resonant inductor (LR) or comprising a crystal device,
a driving branch (14) comprising a pump capacitor (CP) connected to the resonant circuit (12),
a feedback branch (20) connected to the resonant circuit (12),
a phase shifting circuit (22) connected to the resonant circuit (12) via the feedback branch (20),
a comparator circuit (24) connected to the feedback branch (20) via the phase shifting circuit (22) and
a driver circuit (28) connected to an output of the comparator circuit (24) and operable to charge the pump capacitor (CP).

公开(公告)号：US12040747B2

公开(公告)日：2024-07-16

申请号：US17565212

申请日：2021-12-29

Applicant: Cypress Semiconductor Corporation

Inventor： Nandakishore Raimar ,  H P Sachin

IPC: H03K3/0231 ,  H03B5/24 ,  H03K3/011 ,  H03K3/023 ,  H03K3/037 ,  H03K5/24 ,  H04W56/00

CPC classification number: H03B5/24 ,  H03K3/011 ,  H03K3/023 ,  H03K3/0231 ,  H03K3/037 ,  H03K5/24 ,  H04W56/001

Abstract: An oscillation circuit includes resistors with tap points for high/low reference voltages. An RC network coupled in parallel with the resistors includes a first capacitor to vary a first voltage input and a second capacitor to generate a second voltage input. A first comparator alternately compares the voltage inputs with the low reference voltage to generate oscillation outputs. A PTAT current DAC supplies an injection current to a resistor of the series of resistors that variably modulates the reference voltages. A second comparator alternately compares the voltage inputs with the high reference voltage and controls generation of an adaptive bias current to first comparator near a switching threshold voltage range thereof. A chop switch matrix alternately flips voltage reference inputs to input terminals of first comparator. A multiplexer alternately inverts a polarity of the oscillation outputs in concert with alternately flipping the voltage reference inputs by the chop switch matrix.

公开(公告)号：US20240120882A1

公开(公告)日：2024-04-11

申请号：US18542861

申请日：2023-12-18

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Nitin AGARWAL ,  Aniruddha ROY ,  Preetham NARAYANA REDDY

IPC: H03B5/20 ,  H03K3/0231

CPC classification number: H03B5/20 ,  H03K3/0231 ,  H03B2200/0014 ,  H03B2200/0034 ,  H03B2200/0038

Abstract: In an example, a system includes an oscillator circuit on a chip. The oscillator circuit includes a charging current generator including a current mirror, an amplifier, and an on-chip resistor, where the on-chip resistor is coupled to a pin on the chip. The oscillator circuit also includes oscillator circuitry coupled to the charging current generator, where the oscillator circuitry includes a comparator, a phase generator, a first capacitor coupled to a first resistor, and a second capacitor coupled to a second resistor. The system also includes an external resistor coupled to the pin, where the external resistor is external to the chip. The system includes an external capacitor coupled to the pin, where the external capacitor is external to the chip.

公开(公告)号：US20240007086A1

公开(公告)日：2024-01-04

申请号：US18311360

申请日：2023-05-03

Applicant: EM Microelectronic-Marin SA

Inventor： Jiri NERAD

IPC: H03K3/0231 ,  H03K3/014 ,  H03K3/03

CPC classification number: H03K3/0231 ,  H03K3/014 ,  H03K3/03

Abstract: The disclosure concerns an oscillator circuit (10) for a signal transmitter, the oscillator circuit (10) comprising:



a resonant circuit (12) comprising a resonant inductor (LR) and a resonant capacitor (CR) parallel to the resonant inductor (LR) or comprising a crystal device,
a driving branch (14) comprising a pump capacitor (CP) connected to the resonant circuit (12),
a feedback branch (20) connected to the resonant circuit (12),
a phase shifting circuit (22) connected to the resonant circuit (12) via the feedback branch (20),
a comparator circuit (24) connected to the feedback branch (20) via the phase shifting circuit (22) and
a driver circuit (28) connected to an output of the comparator circuit (24) and operable to charge the pump capacitor (CP).

公开(公告)号：US11799459B2

公开(公告)日：2023-10-24

申请号：US17705813

申请日：2022-03-28

Applicant: LAPIS TECHNOLOGY CO., LTD.

Inventor： Seiichiro Sasaki

IPC: H03K4/502 ,  H03K19/20 ,  H03K3/354 ,  H03K3/0231 ,  H03B5/24 ,  H03K3/03 ,  H03K4/501

CPC classification number: H03K4/502 ,  H03B5/24 ,  H03K3/0231 ,  H03K3/03 ,  H03K3/354 ,  H03K4/501 ,  H03K19/20

Abstract: An oscillator circuit includes a first comparator that outputs a first signal indicative of a comparison result between an input potential and a threshold, a second comparator that outputs a second signal indicative of a comparison result between an input potential and the threshold, a RS flip-flop circuit that receives the first signal and the second signal and outputs first and second oscillation signals, a first charge/discharge unit that charges and discharges a first capacitor based on the first oscillation signal, a second charge/discharge unit that charges and discharges a second capacitor based on the second oscillation signal, a first dummy switch controlled to be on and off according to the second oscillation signal and adding a predetermined capacity to a first node, and a second dummy switch controlled to be on and off according to the first oscillation signal and adding a predetermined capacity to a second node.

公开(公告)号：US20230318580A1

公开(公告)日：2023-10-05

申请号：US18328335

申请日：2023-06-02

Applicant: SEIKO EPSON CORPORATION

Inventor： Yoshiyuki Yamaguchi

IPC: H03K3/011 ,  H03K3/36 ,  H03K3/0231 ,  H03L1/04 ,  H03L1/02

CPC classification number: H03K3/011 ,  H03K3/36 ,  H03K3/0231 ,  H03L1/04 ,  H03L1/026

Abstract: Provided is a semiconductor integrated circuit including an oscillation circuit configured to output an oscillation signal, a heater configured to heat the oscillation circuit, a temperature sensor configured to detect a temperature of the oscillation circuit, and a nonvolatile memory configured to store temperature correction data. The oscillation circuit controls a frequency of the oscillation signal based on an output signal of the temperature sensor and the temperature correction data.

公开(公告)号：US20190222201A1

公开(公告)日：2019-07-18

申请号：US16237727

申请日：2019-01-01

Applicant: NXP USA, INC.

Inventor： Yang Wang ,  Jianzhou Wu ,  Jie Jin ,  Jiawei Fu

IPC: H03K3/0231 ,  H03L3/00 ,  H03L7/099

CPC classification number: H03K3/0231 ,  G05F3/262 ,  H03L3/00 ,  H03L7/0995

Abstract: A start-up circuit for a ring current-controlled oscillator (CCO) includes a replica CCO current generator, a replica ring CCO, and a buffer. The ring CCO is connected to a CCO driver and the buffer. The CCO driver generates a CCO current based on a reference current. The ring CCO generates a CCO output voltage at a first oscillating frequency based on the CCO current. The replica CCO current generator generates a replica CCO current based on a reference voltage. The replica ring CCO generates a replica CCO output voltage at a second oscillating frequency based on the replica CCO current. The buffer provides a first current to the ring CCO when the first oscillating frequency is lower than a desired oscillating frequency, and drains a second current from the ring CCO when the first oscillating frequency is greater than the desired oscillating frequency.

公开(公告)号：US20180262183A1

公开(公告)日：2018-09-13

申请号：US15912630

申请日：2018-03-06

Applicant: Rohm Co., Ltd.

Inventor： Shun FUKUSHIMA

IPC: H03K3/353 ,  H03K21/08 ,  H03K19/21 ,  H03M1/66

CPC classification number: H03K3/353 ,  H03K3/0231 ,  H03K19/21 ,  H03K21/08 ,  H03M1/66

Abstract: Provided is an oscillator arranged to output an oscillation signal of an oscillation frequency having an increasing and decreasing component that increases and decreases in one period, and an offset component for each period.

公开(公告)号：US20180183413A1

公开(公告)日：2018-06-28

申请号：US15390397

申请日：2016-12-23

Applicant: ATI TECHNOLOGIES ULC ,  Advanced Micro Devices, Inc.

Inventor： Joyce Cheuk Wai Wong ,  Dragoljub Ignjatovic ,  Mikhail Rodionov ,  Ljubisa Bajic ,  Stephen V. Kosonocky ,  Steven J. Kommrusch

IPC: H03K3/013 ,  H03L7/099 ,  H03L5/00 ,  H03K5/15 ,  H03K5/1534 ,  H03K3/012

CPC classification number: H03K3/013 ,  H03K3/012 ,  H03K3/0231 ,  H03K3/03 ,  H03K5/1506 ,  H03K5/1508 ,  H03K5/1534 ,  H03L1/02 ,  H03L5/00 ,  H03L7/085 ,  H03L7/0997

Abstract: An output clock frequency of an adaptive oscillator circuit changes in response to noise on an integrated circuit power supply line. The circuit features two identical delay lines which are separately connected to a regulated supply and a droopy supply. In response to noise on the droopy supply, the delay lines cause a change in the output clock frequency. The adaptive oscillator circuit slows down the output clock frequency when the droopy supply droops or falls below the regulated supply. The adaptive oscillator circuit clamps the output clock frequency at a level determined by the regulated supply when the droopy supply overshoots or swings above the regulated supply.

公开(公告)号：US20180152177A1

公开(公告)日：2018-05-31

申请号：US15365605

申请日：2016-11-30

Applicant: OmniVision Technologies, Inc.

Inventor： Li YANG ,  Charles Qingle WU

IPC: H03K3/0231 ,  H03B5/24 ,  H03K4/50

CPC classification number: H03K3/0231 ,  H03B5/24 ,  H03K3/011 ,  H03K3/354 ,  H03K4/50

Abstract: An integrated oscillator has an R-S flipflop; a first and second capacitor; a current source transistor; first and second current-steering transistors, each having a source coupled to the current source transistor, with drains coupled to the first and second capacitor respectively. The first current-steering transistor has gate coupled to a first output of the R-S flipflop, and the second current-steering transistor has gate coupled to a second output of the R-S flipflop. The oscillator has a first sense inverter having input from the first capacitor and powered by a feedback circuit adapted to sense voltages on the first and second capacitor; and a second sense inverter having input from the second capacitor and powered by the feedback circuit. The R-S flipflop has a first input coupled to an output of the first sense inverter and a second input coupled to an output of the second sense inverter.