中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

125 records (took 0.021 seconds)

    METHOD AND APPARATUS FOR INCREASING RECEIVER IMMUNITY TO INTERFERENCE
    91.
    发明专利
    METHOD AND APPARATUS FOR INCREASING RECEIVER IMMUNITY TO INTERFERENCE 未知

    公开(公告)号：CA2467295A1

    公开(公告)日：1996-06-20

    申请号：CA2467295

    申请日：1995-12-11

    Applicant: QUALCOMM INC

    Inventor： PETERZELL PAUL E ,  WHEATLEY CHARLES E III ,  WEILAND ANA L ,  KORNFELD RICHARD K

    IPC: H04B1/06 ,  H03G1/00 ,  H03G3/30 ,  H04B20060101 ,  H04B1/10 ,  H04B1/16 ,  H04B1/18 ,  H04B1/40 ,  H04B1/7075 ,  H04B1/7097 ,  H04B3/06 ,  H04B7/005 ,  H04B7/26 ,  H04B15/00

    Abstract: An apparatus to increase a radio receiver's immunity to radio frequency interference, the radio receiver receiving a signal, the apparatus comprising: a switch (1105) coupled to the received signal, the switch (1105) having an open position and a closed position; a resistance (1101), a first end of the resistance (1101) being coupled to the closed position of the switch (1105) and a second end of the resistance (1101) being coupled to a ground potential; an amplifier (1101) having an input coupled to the open position of the switch (1105), for generating an amplified received signal at an output; a controller coupled to the switch (1105), for switching the switch (1105) to the closed position in response to the received signal exceeding a predetermined power level, said received signal conducting through said switch (1105) and said resistance (1101) to ground potential when said switch (1105) is in said closed position; and said resistance (1101) creating an impedance mismatch at the input to said amplifier (1110) when said switch (1105) is in closed position, thereby reducing the gain contributed by said amplifier (1110).

    Method and apparatus for increasing receiver immunity to interference
    92.
    发明专利
    Method and apparatus for increasing receiver immunity to interference 未知

    公开(公告)号：ZA9510321B

    公开(公告)日：1996-06-19

    申请号：ZA9510321

    申请日：1995-12-05

    Applicant: QUALCOMM INC

    Inventor： PETERZELL PAUL E ,  WHEATLEY CHARLES E III ,  KORNFELD RICHARD K ,  WEILAND ANA L

    IPC: H04B1/06 ,  H03G1/00 ,  H03G3/30 ,  H04B20060101 ,  H04B1/10 ,  H04B1/16 ,  H04B1/18 ,  H04B1/40 ,  H04B1/7075 ,  H04B1/7097 ,  H04B3/06 ,  H04B7/005 ,  H04B7/26 ,  H04B15/00 ,  H04J ,  H04B ,  H04L

    Abstract: An apparatus to increase a radio receiver's immunity to radio frequency interference, the radio receiver receiving a signal, the apparatus comprising: a switch (1105) coupled to the received signal, the switch (1105) having an open position and a closed position; a resistance (1101), a first end of the resistance (1101) being coupled to the closed position of the switch (1105) and a second end of the resistance (1101) being coupled to a ground potential; an amplifier (1101) having an input coupled to the open position of the switch (1105), for generating an amplified received signal at an output; a controller coupled to the switch (1105), for switching the switch (1105) to the closed position in response to the received signal exceeding a predetermined power level, said received signal conducting through said switch (1105) and said resistance (1101) to ground potential when said switch (1105) is in said closed position; and said resistance (1101) creating an impedance mismatch at the input to said amplifier (1110) when said switch (1105) is in closed position, thereby reducing the gain contributed by said amplifier (1110).

    Multiple band radio
    93.
    发明专利
    Multiple band radio 未知

    公开(公告)号：ZA957751B

    公开(公告)日：1996-05-31

    申请号：ZA957751

    申请日：1995-09-14

    Applicant: QUALCOMM INC

    Inventor： KORNFELD RICHARD K ,  WHEATLEY CHARLES E III

    IPC: H04B1/38 ,  H04B1/40 ,  H04B7/005 ,  H04B7/12 ,  H04B7/208 ,  H04B7/26 ,  H04J1/04 ,  H04L1/04 ,  H04L5/06 ,  H04Q11/02 ,  H04W36/14 ,  H04W36/18 ,  H04B

    Abstract: The dual band code division multiple access radio of the present invention operates on multiple frequencies simultaneously on either transmit or receive. The transmit path operates by splitting the transmit intermediate frequency (IF) path (103) and mixing the IF to two different transmit frequencies using two frequency synthesizers (140 and 145). The receive path (104) has two RF channels (116 and 117) that are mixed with the frequencies generated by the synthesizers (140 and 145) and summed into one IF strip. Thus the radio of the present invention can perform a soft hand-off between frequencies while communicating with both base stations simultaneously. Additional mixing paths and synthesizers can be added if it is desired to communicate with more than two base stations simultaneously.\!

    94.
    发明专利
    未知

    公开(公告)号：FI955072A0

    公开(公告)日：1995-10-25

    申请号：FI955072

    申请日：1995-10-25

    Applicant: QUALCOMM INC

    Inventor： WEILAND ANA L ,  KORNFELD RICHARD K ,  KERR RICHARD J ,  MALONEY JOHN E ,  WILSON NATHANIEL B

    IPC: H04B1/40 ,  H04B1/04 ,  H04B7/005 ,  H04B7/26 ,  H04W52/06 ,  H04W52/52 ,  H04B

    Abstract: The process and apparatus of the present invention limits the output power of a radiotelephone, operating in a cellular system in the preferred embodiment. This ensures the transmitted sidebands and synthesizer phase noise remains within a certain specification. This is accomplished by power detection and a correction accumulator that together generate a gain control signal by limiting the gain adjustment to a maximum value, even when the cell site communicating with the radiotelephone is sending power turn-up commands to the radiotelephone. This process includes dynamically correcting the output level of the transmitter due to gain variations in the transmitter stages or gain control elements.

    96.
    发明专利
    未知

    公开(公告)号：FI118662B

    公开(公告)日：2008-01-31

    申请号：FI20060862

    申请日：2006-09-27

    Applicant: QUALCOMM INC

    Inventor： WHEATLEY III CHARLES E ,  KORNFELD RICHARD K ,  PETERZELL PAUL E ,  WEILAND ANA L

    IPC: H04B1/06 ,  H04B1/10 ,  H03G1/00 ,  H03G3/30 ,  H04B20060101 ,  H04B1/16 ,  H04B1/18 ,  H04B1/40 ,  H04B1/7075 ,  H04B1/7097 ,  H04B3/06 ,  H04B7/005 ,  H04B7/26 ,  H04B15/00

    Abstract: An apparatus to increase a radio receiver's immunity to radio frequency interference, the radio receiver receiving a signal, the apparatus comprising: a switch (1105) coupled to the received signal, the switch (1105) having an open position and a closed position; a resistance (1101), a first end of the resistance (1101) being coupled to the closed position of the switch (1105) and a second end of the resistance (1101) being coupled to a ground potential; an amplifier (1101) having an input coupled to the open position of the switch (1105), for generating an amplified received signal at an output; a controller coupled to the switch (1105), for switching the switch (1105) to the closed position in response to the received signal exceeding a predetermined power level, said received signal conducting through said switch (1105) and said resistance (1101) to ground potential when said switch (1105) is in said closed position; and said resistance (1101) creating an impedance mismatch at the input to said amplifier (1110) when said switch (1105) is in closed position, thereby reducing the gain contributed by said amplifier (1110).

    97.
    发明专利
    未知

    公开(公告)号：DE69535225T2

    公开(公告)日：2007-09-13

    申请号：DE69535225

    申请日：1995-12-11

    Applicant: QUALCOMM INC

    Inventor： WHEATLEY CHARLES E ,  PETERZELL PAUL E ,  KORNFELD RICHARD K ,  WEILAND ANA L

    IPC: H04B1/06 ,  H04B7/005 ,  H03G1/00 ,  H03G3/20 ,  H03G3/30 ,  H04B20060101 ,  H04B1/10 ,  H04B1/16 ,  H04B1/18 ,  H04B1/40 ,  H04B1/7075 ,  H04B1/7097 ,  H04B3/06 ,  H04B7/26 ,  H04B15/00

    Abstract: An apparatus to increase a radio receiver's immunity to radio frequency interference, the radio receiver receiving a signal, the apparatus comprising: a switch (1105) coupled to the received signal, the switch (1105) having an open position and a closed position; a resistance (1101), a first end of the resistance (1101) being coupled to the closed position of the switch (1105) and a second end of the resistance (1101) being coupled to a ground potential; an amplifier (1101) having an input coupled to the open position of the switch (1105), for generating an amplified received signal at an output; a controller coupled to the switch (1105), for switching the switch (1105) to the closed position in response to the received signal exceeding a predetermined power level, said received signal conducting through said switch (1105) and said resistance (1101) to ground potential when said switch (1105) is in said closed position; and said resistance (1101) creating an impedance mismatch at the input to said amplifier (1110) when said switch (1105) is in closed position, thereby reducing the gain contributed by said amplifier (1110).

    100.
    发明专利
    未知

    公开(公告)号：FI117840B

    公开(公告)日：2007-03-15

    申请号：FI20050748

    申请日：2005-07-13

    Applicant: QUALCOMM INC

    Inventor： WHEATLEY III CHARLES E ,  KORNFELD RICHARD K ,  PETERZELL PAUL E ,  WEILAND ANA L

    IPC: H04B1/06 ,  H04B1/10 ,  H03G1/00 ,  H03G3/30 ,  H04B20060101 ,  H04B1/16 ,  H04B1/18 ,  H04B1/40 ,  H04B1/7075 ,  H04B1/7097 ,  H04B3/06 ,  H04B7/005 ,  H04B7/26 ,  H04B15/00

    Abstract: An apparatus to increase a radio receiver's immunity to radio frequency interference, the radio receiver receiving a signal, the apparatus comprising: a switch (1105) coupled to the received signal, the switch (1105) having an open position and a closed position; a resistance (1101), a first end of the resistance (1101) being coupled to the closed position of the switch (1105) and a second end of the resistance (1101) being coupled to a ground potential; an amplifier (1101) having an input coupled to the open position of the switch (1105), for generating an amplified received signal at an output; a controller coupled to the switch (1105), for switching the switch (1105) to the closed position in response to the received signal exceeding a predetermined power level, said received signal conducting through said switch (1105) and said resistance (1101) to ground potential when said switch (1105) is in said closed position; and said resistance (1101) creating an impedance mismatch at the input to said amplifier (1110) when said switch (1105) is in closed position, thereby reducing the gain contributed by said amplifier (1110).

Patent Agency Ranking