公开(公告)号：FI116342B

公开(公告)日：2005-10-31

申请号：FI972501

申请日：1997-06-12

Applicant: QUALCOMM INC

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

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).

公开(公告)号：ES2225851T3

公开(公告)日：2005-03-16

申请号：ES95943046

申请日：1995-12-11

Applicant: QUALCOMM INC

Inventor： WHEATLEY CHARLES E III ,  PETERZELL PAUL E ,  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

Abstract: EL METODO Y EL APARATO DE LA INVENCION MEJORA LA INMUNIDAD A LAS INTERFERENCIAS DE UN RECEPTOR DE RADIO. SE DETECTA EL NIVEL DE POTENCIA DE UNA SEÑAL RECIBIDA. SI EL NIVEL DE POTENCIA IGUALA O EXCEDE UN LIMITE DE POTENCIA PREDETERMINADO, EL AMPLIFICADOR DE RUIDO BAJO (703) ES DERIVADO (730), INCREMENTADO DE ESTA FORMA EL PUNTO DE INTERSECCION DE LOS COMPONENTES DEL RECEPTOR. REALIZACIONES ALTERNATIVAS INCLUYEN EL USO DE UN DETECTOR DE POTENCIA DE RF (105) PARA CONTROLAR LA GANANCIA DE LA SECCION DE ENTRADA (110) COMO FUNCION DE LA POTENCIA DE PERTURBACION. EN LUGAR DE UN BLOQUE DE GANANCIA DE RF CONMUTABLE (730), SE PROPONEN VARIOS METODOS DE CONTROL CONTINUO DE LA GANANCIA. EL CONTROL CONTINUO DE LA GANANCIA PERMITE SUPRIMIR LAS INTERFERENCIAS Y AJUSTAR LA SENSIBILIDAD DEL RECEPTOR A MENORES NIVELES DE SEÑAL QUE EL BLOQUE DE GANANCIA CONMUTABLE. UN METODO DE LA INVENCION AJUSTA LA GANANCIA DE ENTRADA EN UNA CANTIDAD PREDETERMINADA (1601). EL PROCESAMIENTO DEL RECEPTOR MIDE EL CAMBIO DE GANANCIA EN LA POTENCIA DE LA SEÑAL DE IF (1605). SI EL CAMBIO ES MENOR QUE LA CANTIDAD PREDETERMINADA (1610), LA SEÑAL DE CDMA Y LAS EMISIONES PERTURBADORAS ESTAN POR DEBAJO DEL SUELO DE RUIDO Y, POR LO TANTO, LA GANANCIA SE INCREMENTA (1605). SI EL CAMBIO DE POTENCIA DE LA SEÑAL DE IF ES MAYOR QUE LA CANTIDAD PREDETERMINADA, LA INTERFERENCIA ES EVIDENTE Y LA GANANCIA SE REDUCE PARA REDUCIR LOS PRODUCTOS DE INTERMODULACION (1620). ESTE PROCESO SE UTILIZA HASTA QUE EL RECEPTOR ESTE OPERATIVO CON LA MEJOR RELACION ENTRE EL VALOR DE INTERFERENCIA Y DE RUIDO.

公开(公告)号：CA2275156C

公开(公告)日：2002-11-12

申请号：CA2275156

申请日：1995-02-17

Applicant: QUALCOMM INC

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

IPC: H04W52/08 ,  H04Q7/32

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 contro l 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.

公开(公告)号：AU717794B2

公开(公告)日：2000-03-30

申请号：AU1424999

申请日：1999-01-29

Applicant: QUALCOMM INC

Inventor： WHEATLEY CHARLES E III ,  PETERZELL PAUL E ,  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

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).

公开(公告)号：AU717774B2

公开(公告)日：2000-03-30

申请号：AU1425099

申请日：1999-01-29

Applicant: QUALCOMM INC

Inventor： WHEATLEY CHARLES E III ,  PETERZELL PAUL E ,  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

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).

公开(公告)号：CA2136749C

公开(公告)日：1998-11-03

申请号：CA2136749

申请日：1994-03-25

Applicant: QUALCOMM INC ,  ALPS ELECTRIC CO LTD

Inventor： KORNFELD RICHARD K ,  WEILAND ANA L ,  OKAZAKI MITSUNARI

IPC: H03F1/02 ,  H03F1/30 ,  H03F3/20

Abstract: A control circuit for a multi-stage power amplifier (such as in a portable radio transmitter) compensates for fluctuations in ambient temperature, load, signal level and power supply voltage. The control voltage is set by comparing a biasing level which is related to the amplifier input signal level to a voltage proportional to the power supply current of the last stage of the amplifier. The control voltage resulting from the comparison establishes the operating point of the last stage of the power amplifier.

公开(公告)号：AR003507A1

公开(公告)日：1998-08-05

申请号：AR10423696

申请日：1996-09-05

Applicant: QUALCOMM INC

Inventor： PITTA THOMAS A ,  PETERZELL PAUL E ,  KORNFELD RICHAR K ,  WEILAND ANA L ,  WALLACE RAYMONG C

IPC: H01Q5/00 ,  H01P1/213 ,  H03H7/46 ,  H04B1/40

Abstract: Una disposición de antena de doble banda para usar en dispositivo portátil para comunicaciones se revela en el presente. La disposición de antena incluyeun elemento de antena para irradiar energía electromagnética dentro de rangos de longitud deo nda de banda alta y de banda baja. En un ejemplo preferido, unared aislante de banda baja, acoplada al elemento de antena, provee aislación de senal entre los caminos de senal de banda alta y de banda baja durante laoperación de banda alta. Demanera similar, una red aisladora de banda alta provee aislación de senal, durante la operación sobre el rango de longitudesde onda de banda baja, entre los caminos de senal de banda baja. Durante la operación de transmisión y recepción, laenergía electromagnética de banda altadirigida a través de la antena pasa por las redes aisladoras de banda baja y de banda alta, respectivamente. También se incluyen redes equilibradoras debanda alta y de banda baja que acoplan las redesaisladoras de b anda alta y de banda baja a circuitos transceptores de banda baja y de banda alta.

公开(公告)号：AU681642B2

公开(公告)日：1997-09-04

申请号：AU6416794

申请日：1994-03-25

Applicant: QUALCOMM INC ,  ALPS ELECTRIC CO LTD

Inventor： KORNFELD RICHARD K ,  WEILAND ANA L ,  OKAZAKI MITSUNARI

IPC: H03F1/02 ,  H03F1/30 ,  H03F3/20 ,  H03F3/195 ,  H04B1/04

Abstract: A control circuit for a multi-stage power amplifier (such as in a portable radio transmitter) compensates for fluctuations in ambient temperature, load, signal level and power supply voltage, The control voltage is set by comparing a biasing level which is related to the amplifier input signal level to a voltage proportional to the power supply current of the last stage of the amplifier. The control voltage resulting from the comparison establishes the operating point of the last stage of the power amplifier.

公开(公告)号：MX9703400A

公开(公告)日：1997-07-31

申请号：MX9703400

申请日：1996-09-11

Applicant: QUALCOMM INC

Inventor： PITTA THOMAS A ,  PETERZELL PAUL E ,  KORNFELD RICHARD K ,  WEILAND ANA L ,  WALLACE RAYMOND C

IPC: H01P1/213 ,  H03H7/46 ,  H04B1/40 ,  H01P01/213 ,  H03H07/46

Abstract: Se expone en la presente un sistema de antena de doble banda para utilizarse en un dispositivo de comunicaciones. El sistema de antena incluye un elemento de antena (10) para irradiar energía electromagnética dentro de rangos de longitud de onda de banda baja y de banda elevada. En una modalidad preferida, una red aisladora de bandeja (20), acoplada al elemento de antena (10), proporciona aislamiento de señal entre las trayectorias de banda elevada y de banda baja durante la operacion de banda elevada. De manera similar, una red aisladora de banda elevada (18) proporciona el aislamiento de señal, durante la operacion sobre el rango de banda baja de longitudes de onda, entre las trayectorias de señal de banda elevada y de banda baja. Durante la operacion de transmision y recepcion, la energía electromagnética de banda baja y de banda elevada dirigida a través de la antena (10) se pasa mediante las redes aisladoras de banda baja y de banda elevada, (20) y (18), respectivamente. También se incluyen redes de comparacion de banda baja y de banda elevada (28) y (36), respectivamente, las cuales acoplan las redes aisladoras de banda baja y de banda elevada (20) y (18), respectivamente a la circuitería transceptora de banda baja y de banda elevada.

公开(公告)号：AU6974896A

公开(公告)日：1997-04-01

申请号：AU6974896

申请日：1996-09-11

Applicant: QUALCOMM INC

Inventor： PITTA THOMAS A ,  PETERZELL PAUL E ,  KORNFELD RICHARD K ,  WEILAND ANA L ,  WALLACE RAYMOND C

IPC: H01P1/213 ,  H03H7/46 ,  H04B1/40

Abstract: A dual-band antenna system for use in a portable communications device is disclosed herein. The antenna system includes an antenna element for radiating electromagnetic energy within low-band and high-band wavelength ranges. In a preferred embodiment, a low-band isolator network, coupled to the antenna element, provides signal isolation between high-band and low-band signal paths during high-band operation. Similarly, a high-band isolator network provides signal isolation, during operation over the low-band range of wavelengths, between the high-band and low-band signal paths. During transmit and receive operation, low-band and high-band electromagnetic energy directed through the antenna is passed by the low-band and high-band isolator networks, respectively. Also included are low-band and high-band matching networks which couple the low-band and high-band isolator networks to low-band and high-band transceiver circuitry.