公开(公告)号：CA2334911A1

公开(公告)日：1999-12-23

申请号：CA2334911

申请日：1999-06-14

Applicant: QUALCOMM INC

Inventor： PETERZELL PAUL E ,  CHOW MARLAND ,  ROSS DAVID J

IPC: H02J7/00 ,  H04M1/02 ,  H04M1/72

Abstract: A portable phone (10) has an outer casing (14) with opposite upper and lower walls (16, 18), one of the walls having an opening (24) for access to the interior of the casing, and a lid (28) removably mounted in the opening for normally closing the opening. A main circuit board (22) is mounted in the outer casing, with a plurality of phone components (30) mounted on the circu it board. A predetermined region (26) of the board aligned with the opening is left exposed or empty of components, and forms a recess for receiving a battery (12). The battery receiving recess (26) has contact pads (39, 40), a nd a battery (12) is removably engaged in the recess with battery contacts engaging the contact pads in the recess, whereby the battery can be removed and replaced via the opening after opening the lid.

公开(公告)号：CA2332846A1

公开(公告)日：1999-11-25

申请号：CA2332846

申请日：1999-05-21

Applicant: QUALCOMM INC

Inventor： PETERZELL PAUL E

IPC: H02H3/12 ,  H02H7/18 ,  H02H11/00 ,  H02J7/00

Abstract: A battery protection circuit (10) for an external battery pack (14) has a switch (40) for controlling connection of a battery output to a load, and a detector (44) for detecting a resistance at a load output terminal. A first comparator (50) compares the detected resistance (Rp) to a predetermined maximum value, and a second comparator (54) compares the detected resistance (Rp) to a predetermined minimum value. If the detected resistance is in the range between the minimum and maximum values, a control signal (42) is produced to enable connection of the battery output to the load. If the detected resistance is outside the range, the switch (40) is disabled and no current can flow to the load.

公开(公告)号：ZA991713B

公开(公告)日：1999-11-24

申请号：ZA991713

申请日：1999-03-03

Applicant: QUALCOMM INC

Inventor： CICCARELLI STEVEN ,  PETERZELL PAUL E ,  KAUFMAN RALPH E

IPC: H03F1/02 ,  H03F1/26 ,  H03F1/32 ,  H03F1/34 ,  H03G1/00 ,  H03G3/18 ,  H03G3/20 ,  H04B1/10 ,  H04B1/16 ,  H03F ,  H03G

Abstract: An amplifier having an adjustable current source which can be controlled to provide the requisite level of performance at reduced current consumption. The amplifier is first designed using one of many designs available and known in the art. A current source is then designed to provide adjustable bias current for the amplifier. The current source can be designed with MOSFETs which require no additional bias current and can accept a standard digital control signal. The current source can also be designed with active devices which are selected based on the logic of the control signals for ease of interface. The bias current determines the linearity and noise performance of the amplifier. The bias current is adjusted to provide the requisite level of performance while reducing power consumption. The current source can be designed to operate in discrete steps or to have substantially continuous current steps.

公开(公告)号：HK1011118A1

公开(公告)日：1999-10-29

申请号：HK98110086

申请日：1998-08-21

Applicant: QUALCOMM INC

Inventor： WILSON NATHANIEL B ,  BLACK PETER J ,  PETERZELL PAUL E

IPC: H03G3/20 ,  H03G3/30 ,  H04B1/16 ,  H04B1/18 ,  H04L27/22 ,  H04L27/38 ,  H03G

Abstract: An automatic gain control (AGC) apparatus for a digital receiver is disclosed herein. The AGC apparatus includes an adjustable gain amplifier having an input port for receiving an input signal, a control port for receiving a gain control signal, and an output port for providing an output signal. The AGC apparatus further includes a measurement circuit for generating a received power signal based on the power of the output signal. A saturating integrator compares the received power signal to a reference signal and generates an gain control signal in response to a result of the comparison. The saturating integrator includes a decision circuit for enabling integration based on values of the received power signal, the reference signal, and the gain control signal. In a preferred implementation the utilization of an input limiter in conjunction with an analog to digital converter enables accommodation of an increased input signal dynamic range. Accordingly, the AGC apparatus is capable of being used in digital demodulation of FM signals. The AGC apparatus may also be employed within a dual mode receiver designed to process both FM and code division multiple access (CDMA) input signals.

公开(公告)号：AU702217B2

公开(公告)日：1999-02-18

申请号：AU2398695

申请日：1995-04-28

Applicant: QUALCOMM INC

Inventor： PETERZELL PAUL E ,  WILSON NATHANIEL B ,  BLACK PETER J

IPC: H03G3/20 ,  H03G3/30 ,  H04B1/16 ,  H04B1/18 ,  H04L27/22 ,  H04L27/38

Abstract: An automatic gain control (AGC) apparatus for a digital receiver is disclosed herein. The AGC apparatus includes an adjustable gain amplifier having an input port for receiving an input signal, a control port for receiving a gain control signal, and an output port for providing an output signal. The AGC apparatus further includes a measurement circuit for generating a received power signal based on the power of the output signal. A saturating integrator compares the received power signal to a reference signal and generates an gain control signal in response to a result of the comparison. The saturating integrator includes a decision circuit for enabling integration based on values of the received power signal, the reference signal, and the gain control signal. In a preferred implementation the utilization of an input limiter in conjunction with an analog to digital converter enables accommodation of an increased input signal dynamic range. Accordingly, the AGC apparatus is capable of being used in digital demodulation of FM signals. The AGC apparatus may also be employed within a dual mode receiver designed to process both FM and code division multiple access (CDMA) input signals.

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：AU694514B2

公开(公告)日：1998-07-23

申请号：AU2398995

申请日：1995-04-28

Applicant: QUALCOMM INC

Inventor： WILSON NATHANIEL B ,  BLACK PETER J ,  PETERZELL PAUL E

IPC: H03G3/20 ,  H03D3/00 ,  H03D3/24 ,  H03D7/16 ,  H03G3/30 ,  H04B1/30 ,  H04L27/14 ,  H04L27/22

Abstract: An automatic gain control (AGC) and D.C. offset correction method and apparatus for controlling signal power of a received RF signal within a dual mode quadrature receiver is disclosed herein. In a preferred implementation the automatic gain control apparatus may be adjusted to provide a desired control response to various fading characteristics of a received FM, FSK, GMSK, QPSK, or BPSK signal. The AGC apparatus includes an adjustable gain amplifier having an input port for receiving an input signal, a control port for receiving a gain control signal, and an output port for providing an output signal. A quadrature downconverter coupled to the output port serves to translate the frequency of the output signal to a baseband frequency, thereby producing baseband signals. In a preferred implementation the downconverter is operative to map the carrier frequency of the output signal to a baseband frequency offset by a predetermined margin from D.C. Two high gain active lowpass filters provide out-of-band signal rejection for the baseband signals. A D.C. feedthrough suppression loop, disposed to receive said baseband signal, suppresses D.C. offsets produced by the downconverter and lowpass filters, hence providing a compensated baseband signal. The AGC apparatus is further disposed to generate a received power signal based on the power of the output signal. A saturating integrator compares the received power signal to a reference signal and produces the gain control signal by integrating or by refraining from integration based on values of the reference, received power signal, and gain control signals, thereby extending the usable dynamic range of the receiver for FM mode.

公开(公告)号：BR9507564A

公开(公告)日：1997-08-05

申请号：BR9507564

申请日：1995-04-28

Applicant: QUALCOMM INC

Inventor： PETERZELL PAUL E ,  WILSON NATHANIEL B ,  BLACK PETER J

IPC: H03G3/20 ,  H03G3/30 ,  H04B1/16 ,  H04B1/18 ,  H04L27/22 ,  H04L27/38

Abstract: An automatic gain control (AGC) apparatus for a digital receiver is disclosed herein. The AGC apparatus includes an adjustable gain amplifier having an input port for receiving an input signal, a control port for receiving a gain control signal, and an output port for providing an output signal. The AGC apparatus further includes a measurement circuit for generating a received power signal based on the power of the output signal. A saturating integrator compares the received power signal to a reference signal and generates an gain control signal in response to a result of the comparison. The saturating integrator includes a decision circuit for enabling integration based on values of the received power signal, the reference signal, and the gain control signal. In a preferred implementation the utilization of an input limiter in conjunction with an analog to digital converter enables accommodation of an increased input signal dynamic range. Accordingly, the AGC apparatus is capable of being used in digital demodulation of FM signals. The AGC apparatus may also be employed within a dual mode receiver designed to process both FM and code division multiple access (CDMA) input signals.

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.