公开(公告)号：NO931949D0

公开(公告)日：1993-05-28

申请号：NO931949

申请日：1993-05-28

Applicant: QUALCOMM INC

Inventor： WHEATLEY III CHARLES E ,  PUNCH DEREK N

IPC: H03G3/30 ,  H03G3/20 ,  H03G

Abstract: A closed loop automatic gain control (AGC) circuit with high dynamic range capabilities having an amplifier circuit for receiving an input signal, which is susceptible to variations in signal power, and a control signal. The amplifier circuit is responsive to the control signal for amplifying the input signal at a gain level corresponding to the control signal so as to provide a corresponding output signal. A measurement circuit is coupled to the amplifier means for measuring logarithmic signal power of the amplified input signal and providing a corresponding linear measurement signal. An integration circuit is included for receiving the measurement signal, and a reference signal which corresponds to a desired signal power of the output signal. The integration circuit integrates with respect to time the difference between the measurement signal and the reference signal, and generates the control signal which corresponds to the result of the integration.

公开(公告)号：FI932238A0

公开(公告)日：1993-05-17

申请号：FI932238

申请日：1993-05-17

Applicant: QUALCOMM INC

Inventor： WHEATLEY CHARLES E III ,  PUNCH DEREK N

IPC: H03G3/30 ,  H03G3/20 ,  H03G

Abstract: A closed loop automatic gain control (AGC) circuit with high dynamic range capabilities having an amplifier circuit for receiving an input signal, which is susceptible to variations in signal power, and a control signal. The amplifier circuit is responsive to the control signal for amplifying the input signal at a gain level corresponding to the control signal so as to provide a corresponding output signal. A measurement circuit is coupled to the amplifier means for measuring logarithmic signal power of the amplified input signal and providing a corresponding linear measurement signal. An integration circuit is included for receiving the measurement signal, and a reference signal which corresponds to a desired signal power of the output signal. The integration circuit integrates with respect to time the difference between the measurement signal and the reference signal, and generates the control signal which corresponds to the result of the integration.

公开(公告)号：AU1241692A

公开(公告)日：1992-06-25

申请号：AU1241692

申请日：1991-11-27

Applicant: QUALCOMM INC

Inventor： WHEATLEY CHARLES E III ,  PUNCH DEREK N

IPC: H03G3/30 ,  H03G3/20

Abstract: A closed loop automatic gain control (AGC) circuit with high dynamic range capabilities having an amplifier circuit for receiving an input signal, which is susceptible to variations in signal power, and a control signal. The amplifier circuit is responsive to the control signal for amplifying the input signal at a gain level corresponding to the control signal so as to provide a corresponding output signal. A measurement circuit is coupled to the amplifier means for measuring logarithmic signal power of the amplified input signal and providing a corresponding linear measurement signal. An integration circuit is included for receiving the measurement signal, and a reference signal which corresponds to a desired signal power of the output signal. The integration circuit integrates with respect to time the difference between the measurement signal and the reference signal, and generates the control signal which corresponds to the result of the integration.

公开(公告)号：EP0559840A4

公开(公告)日：1994-11-23

申请号：EP92904567

申请日：1991-11-27

Applicant: QUALCOMM INC

Inventor： WHEATLEY CHARLES E III ,  PUNCH DEREK N

IPC: H03G3/30 ,  H03G3/20

CPC classification number: H03G3/3042 ,  H03G3/3078

Abstract: A closed loop automatic gain control (AGC) circuit with high dynamic range capabilities having an amplifier circuit (18) for receiving an input signal, which is susceptible to variations in signal power, and a control signal. The amplifier circuit (18) is responsive to the control signal for amplifying the input signal at a gain level corresponding to the control signal so as to provide a corresponding output signal. A measurement circuit (20) is coupled to the amplifier means (18) for measuring logarithmic signal power of the amplified input signal and providing a corresponding linear measurement signal. An integration circuit (22) is included for receiving the measurement signal, and a reference signal which corresponds to a desired signal power of the output signal. The integration circuit (22) integrates with respect to time the difference between the measurement signal and the reference signal, and generates the control signal which corresponds to the result of the integration.