公开(公告)号：DE60213439D1

公开(公告)日：2006-09-07

申请号：DE60213439

申请日：2002-06-03

Applicant: MOTOROLA INC

Inventor： BEN-AYUN MOSHE ,  ROZENTAL MARK ,  PASTERNAK ROMAN

IPC: H03G3/30 ,  H03G3/20

Abstract: An automatic gain control (AGC) circuit including: a forward transmission path ( 214 ) having applied at its input an input RF signal and to provide at its output an output signal; a variable gain AGC amplifier ( 210 ) in the forward transmission path for processing the input RF signal, which amplifier has a control input 240 and is responsive to a control signal applied at its control input to vary its gain; a feedback loop ( 220 to 240 ), coupled from the output of the forward transmission path and to the control input of the AGC amplifier; an integrator ( 230, 232 ), coupled to the control input of the amplifier; a voltage source ( 234 ), coupled to the integrator and to the control input of the amplifier; and a further variable gain device ( 215 ) for varying the gain or attenuation of a signal applied to the control input of the AGC amplifier.

公开(公告)号：AT334505T

公开(公告)日：2006-08-15

申请号：AT02730287

申请日：2002-06-03

Applicant: MOTOROLA INC

Inventor： BEN-AYUN MOSHE ,  ROZENTAL MARK ,  PASTERNAK ROMAN

IPC: H03G3/20 ,  H03G3/30

Abstract: An automatic gain control (AGC) circuit including: a forward transmission path ( 214 ) having applied at its input an input RF signal and to provide at its output an output signal; a variable gain AGC amplifier ( 210 ) in the forward transmission path for processing the input RF signal, which amplifier has a control input 240 and is responsive to a control signal applied at its control input to vary its gain; a feedback loop ( 220 to 240 ), coupled from the output of the forward transmission path and to the control input of the AGC amplifier; an integrator ( 230, 232 ), coupled to the control input of the amplifier; a voltage source ( 234 ), coupled to the integrator and to the control input of the amplifier; and a further variable gain device ( 215 ) for varying the gain or attenuation of a signal applied to the control input of the AGC amplifier.

公开(公告)号：DE60213439T2

公开(公告)日：2006-12-21

申请号：DE60213439

申请日：2002-06-03

Applicant: MOTOROLA INC

Inventor： BEN-AYUN MOSHE ,  ROZENTAL MARK ,  PASTERNAK ROMAN

IPC: H03G3/30 ,  H03G3/20

Abstract: An automatic gain control (AGC) circuit including: a forward transmission path ( 214 ) having applied at its input an input RF signal and to provide at its output an output signal; a variable gain AGC amplifier ( 210 ) in the forward transmission path for processing the input RF signal, which amplifier has a control input 240 and is responsive to a control signal applied at its control input to vary its gain; a feedback loop ( 220 to 240 ), coupled from the output of the forward transmission path and to the control input of the AGC amplifier; an integrator ( 230, 232 ), coupled to the control input of the amplifier; a voltage source ( 234 ), coupled to the integrator and to the control input of the amplifier; and a further variable gain device ( 215 ) for varying the gain or attenuation of a signal applied to the control input of the AGC amplifier.

公开(公告)号：GB2380341B

公开(公告)日：2003-11-12

申请号：GB0123500

申请日：2001-09-29

Applicant: MOTOROLA INC

Inventor： BEN-AYUN MOSHE ,  ROZENTAL MARK ,  PASTERNAK ROMAN ,  AVAYU IZAK

IPC: H03G3/20 ,  H03G3/30

Abstract: An automatic gain control (AGC) circuit including: a forward transmission path ( 214 ) having applied at its input an input RF signal and to provide at its output an output signal; a variable gain AGC amplifier ( 210 ) in the forward transmission path for processing the input RF signal, which amplifier has a control input 240 and is responsive to a control signal applied at its control input to vary its gain; a feedback loop ( 220 to 240 ), coupled from the output of the forward transmission path and to the control input of the AGC amplifier; an integrator ( 230, 232 ), coupled to the control input of the amplifier; a voltage source ( 234 ), coupled to the integrator and to the control input of the amplifier; and a further variable gain device ( 215 ) for varying the gain or attenuation of a signal applied to the control input of the AGC amplifier.

公开(公告)号：ES2268031T3

公开(公告)日：2007-03-16

申请号：ES02730287

申请日：2002-06-03

Applicant: MOTOROLA INC

Inventor： BEN-AYUN MOSHE ,  ROZENTAL MARK ,  PASTERNAK ROMAN

IPC: H03G3/30 ,  H03G3/20

Abstract: Un circuito de control automático de ganancia (AGC), que comprende: un trayecto de transmisión hacia delante (214) que tiene, en uso, aplicada en su entrada una señal RF de entrada, y que es para proporcionar en su salida una señal de salida; un amplificador AGC de ganancia variable (210) en el trayecto de transmisión hacia delante, para procesar la señal RF de entrada, amplificador que tiene una entrada de control (240), y es sensible a una señal de control aplicada en su entrada de control, para variar su ganancia; un bucle de realimentación (220 a 240), acoplado desde la salida del mencionado trayecto de transmisión hacia delante, y a la mencionada entrada de control del mencionado amplificador AGC, incluyendo el mencionado bucle de realimentación, un detector de señal (218) que tiene una respuesta de ganancia no lineal predeterminada, que depende de un nivel de señal de entrada, siendo la ganancia superior para una intensidad de señal de entrada mayor, un integrador (230, 232), acopladoa la mencionada entrada de control del mencionado amplificador; y, una fuente de tensión (234), acoplada al mencionado integrador y a la mencionada entrada de control del mencionado amplificador, estando el circuito caracterizado por el hecho de que incluye además un dispositivo suplementario de ganancia variable (215), en el trayecto de transmisión hacia delante, para ajustar una señal a ser aplicada en el bucle de realimentación, teniendo el dispositivo suplementario de ganancia variable, un primer nivel de ganancia y un segundo nivel de ganancia, superior respecto del primer nivel de ganancia, y pudiendo funcionar durante un periodo de ataque rápido y estabilización, del circuito de control automático de ganancia, para conmutar su ganancia entre el primer nivel de ganancia y el segundo nivel de ganancia, al efecto de proporcionar un ataque rápido con sobreimpulso reducido.

公开(公告)号：AU2002302637A1

公开(公告)日：2003-04-14

申请号：AU2002302637

申请日：2002-06-03

Applicant: AVAYU IZAK ,  MOTOROLA LTD ,  MOTOROLA INC

Inventor： PASTERNAK ROMAN ,  BEN-AYUN MOSHE ,  ROZENTAL MARK

IPC: H03G3/20 ,  H03G3/30

Abstract: An automatic gain control (AGC) circuit including: a forward transmission path ( 214 ) having applied at its input an input RF signal and to provide at its output an output signal; a variable gain AGC amplifier ( 210 ) in the forward transmission path for processing the input RF signal, which amplifier has a control input 240 and is responsive to a control signal applied at its control input to vary its gain; a feedback loop ( 220 to 240 ), coupled from the output of the forward transmission path and to the control input of the AGC amplifier; an integrator ( 230, 232 ), coupled to the control input of the amplifier; a voltage source ( 234 ), coupled to the integrator and to the control input of the amplifier; and a further variable gain device ( 215 ) for varying the gain or attenuation of a signal applied to the control input of the AGC amplifier.

公开(公告)号：GB2380341A

公开(公告)日：2003-04-02

申请号：GB0123500

申请日：2001-09-29

Applicant: MOTOROLA INC

Inventor： BEN-AYUN MOSHE ,  ROZENTAL MARK ,  PASTERNAK ROMAN ,  AVAYU IZAK

IPC: H03G3/20 ,  H03G3/30

Abstract: An automatic gain control (AGC) circuit comprising: ```a forward transmission path having, in use, applied at its input an input RF signal and to provide at its output an output signal; ```a variable gain AGC amplifier in the forward transmission path for processing the input RF signal, which amplifier has a control input and is responsive to a control signal applied at its control input to to vary its gain; ```a feedback loop, coupled from the output of said forward transmission path and to said control input of said AGC amplifier, said feedback loop including a signal detector that has a predetermined non-linear gain response, depending on an input signal level, the gain being higher for greater input signal strength, ```an integrator, coupled to said control input of said amplifier; and, ```a voltage source, coupled to said integrator and to said control input of said amplifier, ```the circuit being characterised by the fact that it also includes a further variable gain device for varying the gain or attenuation of a signal applied as an input signal to the control input of said AGC amplifier. The variable gain device may be switched between gains to reduce overshoot (see fig 6). Off channel detection is used in a second embodiment (see fig 7).