公开(公告)号：AU2003213278A1

公开(公告)日：2003-09-29

申请号：AU2003213278

申请日：2003-02-24

Applicant: MOTOROLA INC

Inventor： SCHWENT DALE ,  NAGODE THOMAS ,  PRATT PATRICK

IPC: H03F1/02 ,  H04B1/04 ,  H04B7/26 ,  H04B15/00 ,  H04N7/00

Abstract: Methods in radio communications devices having a transmitter with an integral control loop, and in other integral control systems, including generating a first error signal ( 210 ) based upon an amplifier output signal and a corrected reference signal, generating a second error ( 220 ) signal based on a closed loop integral control signal applied to a control input of the amplifier and based on an integral control reference signal, and generating the corrected reference signal ( 230 ) by correcting a reference signal based upon the first and second error signals.

公开(公告)号：AU2002356718A1

公开(公告)日：2003-09-09

申请号：AU2002356718

申请日：2002-11-25

Applicant: MOTOROLA INC

Inventor： NAGODE THOMAS ,  PRATT PATRICK ,  SCHWENT DALE

IPC: G05B5/01 ,  G05B15/00

Abstract: An apparatus and method for controlling an output (50) of a digital system (10) comprising, for example, an output of a power amplifier (24) to minimise or neutralise nonlinearities such as limit cycles. The digital system comprises a nonlinearity means or limit cycle suppressor (16) to counter the limit cycle effect by intentionally introducing a second nonlinearity into the system (10) to suppress the limit cycle effect in the digital system (10).