公开(公告)号：US20180351514A1

公开(公告)日：2018-12-06

申请号：US15779176

申请日：2015-12-17

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： Alexander Oon ,  Teik Yang Goh ,  Yuan Wei Ng ,  Seow Teng Wong

IPC: H03F1/02 ,  H03F1/22 ,  H03F3/19

CPC classification number: H03F1/0272 ,  H03F1/14 ,  H03F1/22 ,  H03F1/226 ,  H03F3/19 ,  H03F2200/18 ,  H03F2200/294 ,  H03F2200/474

Abstract: A method and apparatus for a dual-feedback, amplifier limiter for providing a conditioned radio-frequency signal. The dual-feedback, amplifier limiter includes an input that receives a radio-frequency signal and a stacked amplifier including an input node coupled to the input, an output node, a first transistor configured as a common-base amplifier, and a second transistor configured as a common-emitter amplifier. The dual-feedback, amplifier limiter further includes an output coupled to the output node of the stacked amplifier. The output provides the conditioned radio-frequency signal. The dual-feedback, amplifier limiter further includes a radio-frequency feedback circuit coupled to the stacked amplifier. The radio-frequency feedback circuit includes a passive radio-frequency dependent reactive element in series with a radio-frequency feedback circuit resistor. The dual-feedback, amplifier limiter further includes an envelope control feedback circuit coupled to the stacked amplifier and including a current mirror and a reactive element loop filter.

公开(公告)号：US10581383B2

公开(公告)日：2020-03-03

申请号：US15779176

申请日：2015-12-17

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： Alexander Oon ,  Teik Yang Goh ,  Yuan Wei Ng ,  Seow Teng Wong

IPC: H03F3/04 ,  H03F1/02 ,  H03F3/19 ,  H03F1/22 ,  H03F1/14

Abstract: A method and apparatus for a dual-feedback, amplifier limiter for providing a conditioned radio-frequency signal. The dual-feedback, amplifier limiter includes an input that receives a radio-frequency signal and a stacked amplifier including an input node coupled to the input, an output node, a first transistor configured as a common-base amplifier, and a second transistor configured as a common-emitter amplifier. The dual-feedback, amplifier limiter further includes an output coupled to the output node of the stacked amplifier. The output provides the conditioned radio-frequency signal. The dual-feedback, amplifier limiter further includes a radio-frequency feedback circuit coupled to the stacked amplifier. The radio-frequency feedback circuit includes a passive radio-frequency dependent reactive element in series with a radio-frequency feedback circuit resistor. The dual-feedback, amplifier limiter further includes an envelope control feedback circuit coupled to the stacked amplifier and including a current mirror and a reactive element loop filter.