公开(公告)号：CA2212950A1

公开(公告)日：1998-03-13

申请号：CA2212950

申请日：1997-08-13

Applicant: MOTOROLA INC

Inventor： RICH RANDALL WAYNE

IPC: H03G3/30 ,  H04B1/04 ,  H04B7/005 ,  H03F3/24 ,  H04Q7/32

Abstract: A gain controller (130) for a radio frequency (RF) transmitter (102) controls a power level of a signal (123) transmitted within a predetermined range of output power levels. The gain controller (130) provides the first gain control signal (131) and the second gain control signal (133) responsive to an output power level control signal (150). The first gain control signal (131) controls a gain of a first variable gain stage (144) to vary the power level of the transmit signal (115) at an intermediate frequency causing the output power level of the transmit signal (123) to vary over a lower range of the predetermined range of output power levels. The second gain control signal (133) controls a gain of the second variable gain stage (120) to vary the power level of the transmit signal (121) at a radio frequency causing the output power level of the transmit signal (123) to vary over an upper range of the predetermined range of output power levels. The power control circuit (130) is advantageously utilized in a code division multiple access (CDMA) radiotelephone (100) to provide power control over an 85 dB range of power levels while minimizing sideband noise emissions, current drain, and complexity of the RF transmitter (102).

公开(公告)号：CA2066711C

公开(公告)日：1996-09-03

申请号：CA2066711

申请日：1991-07-18

Applicant: MOTOROLA INC

Inventor： RICH RANDALL WAYNE ,  OSMANI RASHID MASOOD ,  WALCZAK THOMAS JOSEPH ,  CAHILL STEPHEN VINCENT

IPC: H04B1/16 ,  H03G3/20 ,  H04L27/14 ,  H04L27/152 ,  H04L27/22 ,  H04Q9/00 ,  H04B1/06

Abstract: A gain control system for controlling signal levels of the signal received by a receiver. The gain control system is operable to control the signal levels of the signal when the signal is comprised of either a conventional, constant envelope signal, such as an FM signal, or a non-constant envelope signal, such as a TDMA composite modulated signal. The gain control system may be advantageously embodied in a dual-mode radiotelephone operable to receive both conventional, FM signals and TDMA, composite modulated signals.

公开(公告)号：CA2189720A1

公开(公告)日：1997-05-30

申请号：CA2189720

申请日：1996-11-06

Applicant: MOTOROLA INC

Inventor： BRUCKERT EUGENE J ,  VILMUR RICHARD JOSEPH ,  RICH RANDALL WAYNE

IPC: H04B7/08 ,  H04B7/02 ,  H04Q7/32

Abstract: A radio subscriber unit (102) comprises a controller (108) and a switched antenna diversity receiver apparatus (106) including a first antenna (114), a second antenna (116) and a receiver (126). The first antenna (114) is adapted to receive a first representation (158) of a radio frequency (RF) signal (156). The second antenna (116) is adapted to receive a second representation (160) of the RF signal (156). The receiver (126), selectively coupled to the first antenna (114) and the second antenna (116), generates a received signal (153) responsive to receiving at least one of the first representation (158) of the RF signal (156) from the first antenna (114) and the second representation (160) of the RF signal (156) from the second antenna (116). The controller (108), coupled to the receiver (126), selectively couples to the receiver (126), responsive to the received signal (153), one of: only the first antenna (114), only the second antenna (116) and both the first antenna (114) and the second antenna (116).

公开(公告)号：CA2066420C

公开(公告)日：1996-10-22

申请号：CA2066420

申请日：1991-07-11

Applicant: MOTOROLA INC

Inventor： RICH RANDALL WAYNE ,  OSMANI RASHID MASOOD ,  WALCZAK THOMAS JOSEPH ,  CAHILL STEPHEN VINCENT

IPC: H03J7/06 ,  H04B1/40 ,  H04L27/227 ,  H04Q7/22 ,  H04Q7/24 ,  H04Q7/26 ,  H04Q7/30 ,  H04Q7/36 ,  H04Q7/38

Abstract: A frequency control system (126) for locking the frequency of a receiver, susch as a receiver portion of a transceiver, to the frequency of a transmitter, such as a base station. The frequency control system (126) is operable to determine a center, or other reference, frequency of a signal, either a conventional analog signal, or discrete, encoded signal. The frequency control system may be advantageously embodied in a dual-mode radiotelephone operable to receive both conventional, analog signals and discrete, encoded signals.

公开(公告)号：CA2189720C

公开(公告)日：2000-06-13

申请号：CA2189720

申请日：1996-11-06

Applicant: MOTOROLA INC

Inventor： BRUCKERT EUGENE J ,  VILMUR RICHARD JOSEPH ,  RICH RANDALL WAYNE

IPC: H04B7/08 ,  H04B7/02 ,  H04Q7/32

Abstract: A radio subscriber unit (102) comprises controller (108) and a switched antenna diversity receiver apparatus (106) including a first antenna (114), a second antenna (116) and a receiver (126). The first antenna (114) is adapted to receive a first representation (158) of a radio frequency (RF) signal (156). The second antenna (116) is adapted to receive a second representation (160) of the RF signal (156). The receiver (126), selectively coupled to the first antenna (114) and the second antenna (116), generates a received signal (153) responsive to receiving at least one of the first representation (158) of the RF signal (156) from the first antenna (114) and the second representation (160) of the RF signal (156) from the second antenna (116). The controller (108), coupled to the receiver (126), selectively couples to the receiver (126), responsive to the received signal (153), one of: only the first antenna (114), only the second antenna (116) and both the first antenna (114) and the second antenna (116).

公开(公告)号：CA2175860A1

公开(公告)日：1996-12-03

申请号：CA2175860

申请日：1996-05-06

Applicant: MOTOROLA INC

Inventor： RICH RANDALL WAYNE ,  VILMUR RICHARD JOSEPH

IPC: H04B1/10 ,  H04B7/005 ,  H04B1/18 ,  H04B7/216

Abstract: A code division multiple access (CDMA) radio receiver (104) having gain receives a radio frequency (RF) signal (122) to produce a received signal (124). The quality (130) of the received signal (124) is determined (111). The quality (130) is preferably a ratio of an energy per chip of a desired signal (Ec) to a total power spectral density of the received signal (Io) (124). For alternative radio receivers (104) the quality (130) may be an error rate estimate of a demodulated signal (126). The gain of the radio receiver (104) is adjusted responsive to the quality (130) of the received signal (124) to optimize the quality (130) of the received signal (124). Further, since the adjusted gain also changes a received signal strength indication (RSSI) (242) of the received signal (124), the RSSI (242) of the received signal (124) is estimated (217) and compensated (218) responsive to the gain of the radio receiver (104) to produce a compensated RSSI (134) of the received signal (124) indicative of the RSSI of a desired RF signal (122).

公开(公告)号：CA2084990C

公开(公告)日：1996-07-23

申请号：CA2084990

申请日：1992-04-08

Applicant: MOTOROLA INC

Inventor： RICH RANDALL WAYNE ,  SCHWENT DALE GERARD ,  OSMANI RASHID M

IPC: C07C29/09 ,  C07C29/86 ,  C07C31/20 ,  C07C31/22 ,  C07C31/27 ,  C07C45/50 ,  C07C45/81 ,  C07C45/85 ,  C07C47/02 ,  H01P1/205 ,  H01P5/18 ,  H03G3/20 ,  H04B1/04 ,  H04B1/38 ,  H04B1/40 ,  H04Q7/38 ,  H03H9/24 ,  H03H7/48

Abstract: A cellular telephone transmitter (100) includes a variable-gain power amplifier (102), the output of which is filtered and sampled by a filter (104) with an integral directional coupler. Filter (104) includes both a transmitter signal filter and a directional coupler on a ceramic block of one or more pieces. The directional coupler has been realized by two coupled transmission lines provided by the two holes (206 and 207) on the left side of the ceramic block, and the transmitter filter has been realized by five short-circuited coupled transmission lines provided by the five holes (201-205) on the right side of the ceramic block.