公开(公告)号：US20170155362A1

公开(公告)日：2017-06-01

申请号：US14956189

申请日：2015-12-01

Applicant: ANALOG DEVICES GLOBAL

Inventor： Sivanendra Selvanayagam

IPC: H03D7/14 ,  H04B1/16 ,  H03K5/156

CPC classification number: H03D7/1441 ,  H03D7/1466 ,  H03K5/1565 ,  H04B1/0082 ,  H04B1/16

Abstract: Provided herein are oscillator paths between an oscillator and mixers. In an embodiment, the oscillator paths include a first path between an oscillator and a first mixer and a second path between the oscillator and the second mixer, in which the first path is enabled in a first state (e.g., a low band state) and the second path is enabled in a second state (e.g., a high band state). The first path can include a radio frequency divider configured to receive a signal having the oscillator frequency and to divide the signal in frequency by a positive odd integer divisor greater than one, and a duty cycle correction circuit configured to receive an output from the radio frequency divider and provide an output having a duty cycle that is closer to 50% than the output from the divider. Such separate oscillator paths can, for example, enhance receiver performance.

公开(公告)号：US09712113B2

公开(公告)日：2017-07-18

申请号：US14956189

申请日：2015-12-01

Applicant: ANALOG DEVICES GLOBAL

Inventor： Sivanendra Selvanayagam

IPC: H04B1/16 ,  H03D7/14 ,  H03K5/156

CPC classification number: H03D7/1441 ,  H03D7/1466 ,  H03K5/1565 ,  H04B1/0082 ,  H04B1/16

Abstract: Provided herein are oscillator paths between an oscillator and mixers. In an embodiment, the oscillator paths include a first path between an oscillator and a first mixer and a second path between the oscillator and the second mixer, in which the first path is enabled in a first state (e.g., a low band state) and the second path is enabled in a second state (e.g., a high band state). The first path can include a radio frequency divider configured to receive a signal having the oscillator frequency and to divide the signal in frequency by a positive odd integer divisor greater than one, and a duty cycle correction circuit configured to receive an output from the radio frequency divider and provide an output having a duty cycle that is closer to 50% than the output from the divider. Such separate oscillator paths can, for example, enhance receiver performance.

公开(公告)号：US20170155414A1

公开(公告)日：2017-06-01

申请号：US14956257

申请日：2015-12-01

Applicant: ANALOG DEVICES GLOBAL

Inventor： Sivanendra Selvanayagam ,  Shane A. O'Mahony ,  Michael J. Deeney ,  Niall Kevin Kearney

IPC: H04B1/12 ,  H03F3/193 ,  H03F1/02

CPC classification number: H04B1/126 ,  H03F1/0205 ,  H03F1/301 ,  H03F3/193 ,  H03F3/45179 ,  H03F2200/294 ,  H03F2200/451

Abstract: Provided herein are apparatus and methods for transconductance amplifiers, such as split cascode low-noise transconductance amplifiers (LNTAs). In an embodiment, an LNTA includes split current paths each coupled to a different mixer by way of a different alternating current (AC) coupling capacitor. The split current paths of the LNTA can be enabled during different modes of operation, such as when the input to the LNTA is within different frequency bands.

公开(公告)号：US09755678B2

公开(公告)日：2017-09-05

申请号：US14956257

申请日：2015-12-01

Applicant: ANALOG DEVICES GLOBAL

Inventor： Sivanendra Selvanayagam ,  Shane A. O'Mahony ,  Michael J. Deeney ,  Niall Kevin Kearney

IPC: H04B1/12 ,  H03F1/02 ,  H03F3/193

CPC classification number: H04B1/126 ,  H03F1/0205 ,  H03F1/301 ,  H03F3/193 ,  H03F3/45179 ,  H03F2200/294 ,  H03F2200/451

Abstract: Provided herein are apparatus and methods for transconductance amplifiers, such as split cascode low-noise transconductance amplifiers (LNTAs). In an embodiment, an LNTA includes split current paths each coupled to a different mixer by way of a different alternating current (AC) coupling capacitor. The split current paths of the LNTA can be enabled during different modes of operation, such as when the input to the LNTA is within different frequency bands.