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公开(公告)号：JP2001251202A
公开(公告)日：2001-09-14
申请号：JP2001002844
申请日：2001-01-10
Applicant: MOTOROLA INC
Inventor： KLOMSDORF ARMIN , WINKELMANN LUKE , SCHWENT DALE GERARD , GREENE MATTHEW
Abstract: PROBLEM TO BE SOLVED: To provide a modulation format switch that is operated in many operating modes and realizes simplicity, miniaturization, reduction in the manufacturing cost, and enhancement of amplifier performance. SOLUTION: A modulation format switch (20) communicates a signal with an amplifier (15) and a load (25). The amplifier generates modulation format signals. The modulation format switch (20) includes at least one matching network (62, 100), that communicates a signal with the amplifier (15) and the load (25). At least one matching network can have impedance values corresponding to a plurality of the modulation format signals. Furthermore, the modulation format switch (20) also includes variable control elements (70, 72, 74, 76, 102) in the matching network (62, 100). The variable control elements (70, 72, 74, 76, 102) may have one or more impedance values.
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公开(公告)号：JPH11220423A
公开(公告)日：1999-08-10
申请号：JP31704898
申请日：1998-11-09
Applicant: MOTOROLA INC
Inventor： SCHWENT DALE GERARD , NEUZIL CLINT HOWARD
Abstract: PROBLEM TO BE SOLVED: To provide a linear transmitter capable of maintaining satisfactory efficiency in various operating states by measuring channel power generated by the transmitter. SOLUTION: This device uses a transmitter 110 having a main local oscillator(LO) 124 and an offset voltage controlled oscillator(VCO) 122 for generating a carrier frequency. In a measuring mode, the frequency of LO 124 and VCO 122 is changed a little and on channel power and off channel power can be acquired. While using this power, it is discriminated whether the adjacent or substitutive channel leak power caused by non-linearity generable in a power amplifier 116 is settled within the range of a specification request or not. When converting the signals of on channel, adjacent channel and substitutive channel to a base band, a measurement calculator 185 loaded on a digital signal processor(DSP) 180 discriminates the adjacent and substitutive channel leakage power.
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公开(公告)号：DE19850938B4
公开(公告)日：2005-03-03
申请号：DE19850938
申请日：1998-11-05
Applicant: MOTOROLA INC
Inventor： SCHWENT DALE GERARD
IPC: H04B1/40 , H03F3/193 , H03F3/45 , H04B1/50 , H04B1/52 , H04B7/212 , H04B7/26 , H04B17/00 , G01R21/01
Abstract: An off-channel leakage power monitor implemented in a transceiver (100) dynamically measures adjacent and alternate channel leakage power produced by nonlinearities in a transmitter (110) power amplifier (116). A main local oscillator (124), offset voltage-controlled oscillator (122), and second local oscillator (170) are adjusted to obtain on-channel power, adjacent channel power, and alternate channel power measurements using a measurement calculator (185) implemented in a digital signal processor (180) or as a gate array in a receiver (140). Once the off-channel leakage power measurements have been obtained, any number of techniques can be used to extract increased efficiency from the power amplifier (116) while maintaining acceptable linearity under changing operating conditions.
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公开(公告)号：BR9804332A
公开(公告)日：1999-12-21
申请号：BR9804332
申请日：1998-11-03
Applicant: MOTOROLA INC
Inventor： SCHWENT DALE GERARD , NEUZIL CLINT HOWARD
IPC: H04B1/40 , H03F3/193 , H03F3/45 , H04B1/50 , H04B1/52 , H04B7/212 , H04B7/26 , H04B17/00 , H04B1/38 , H04Q7/32
Abstract: An off-channel leakage power monitor implemented in a transceiver (100) dynamically measures adjacent and alternate channel leakage power produced by nonlinearities in a transmitter (110) power amplifier (116). A main local oscillator (124), offset voltage-controlled oscillator (122), and second local oscillator (170) are adjusted to obtain on-channel power, adjacent channel power, and alternate channel power measurements using a measurement calculator (185) implemented in a digital signal processor (180) or as a gate array in a receiver (140). Once the off-channel leakage power measurements have been obtained, any number of techniques can be used to extract increased efficiency from the power amplifier (116) while maintaining acceptable linearity under changing operating conditions.
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公开(公告)号：GB2331419A
公开(公告)日：1999-05-19
申请号：GB9822197
申请日：1998-10-13
Applicant: MOTOROLA INC
Inventor： SCHWENT DALE GERARD , NEUZIL CLINT HOWARD
IPC: H04B1/40 , H03F3/193 , H03F3/45 , H04B1/50 , H04B1/52 , H04B7/212 , H04B7/26 , H04B17/00 , H03F1/32
Abstract: An off-channel leakage power monitor implemented in a transceiver (100) dynamically measures adjacent and alternate channel leakage power produced by nonlinearities in a transmitter (110) power amplifier (116). A main local oscillator (124), offset voltage-controlled oscillator (122), and second local oscillator (170) are adjusted to obtain on-channel power, adjacent channel power, and altemate channel power measurements using a measurement calculator (185) implemented in a digital signal processor (180) or as a gate array in a receiver (140). Once the off-channel leakage power measurements have been obtained, any number of techniques can be used to extract increased efficiency from the power amplifier (116) while maintaining acceptable linearity under changing operating conditions. Different local oscillator and filter arrangements are shown in figures 2-4. Use in a TDMA system is described.
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Patent Agency Ranking
公开(公告)号：AU4302689A
公开(公告)日：1990-05-28
申请号：AU4302689
申请日：1989-09-22
Applicant: MOTOROLA INC
Inventor： SCHWENT DALE GERARD
Abstract: An integral phase shifting network (215,216,217) of a transmitter filter (104) provides a means to reduce the size and increase the efficiency of an antenna coupling network. The network to shift the phase of the transmitter filter (104) is printed by depositing conductive material directly on a ceramic block (230) using low-loss circuit elements and can be tuned easily by removing conductive material if required in certain applications. By utilizing an integral phase shifting network (215,216,217), either transmit filter (104) or receive filter (112) having a highly reactive and capacitive out-of-band impedance in the receive or transmit band, respectively, can be connected to a common antenna port without external transmission lines.
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公开(公告)号：CA2138029C
公开(公告)日：1998-09-22
申请号：CA2138029
申请日：1994-05-04
Applicant: MOTOROLA INC
Inventor： SCHWENT DALE GERARD , OSMANI RASHID MASHID MASOOD
Abstract: (see fig.1) An apparatus and method for varying coupling of a radio frequency (RF) signal (4 08). This is advantageously used for increasing the dynamic range of a power detector (406;) in an automatic power level control loo p (403) of a transmission unit (404), while maintaining unit efficiency at higher power levels. This is accomplished by selecting betwee n a first operating mode of the RF coupler (405) having strong coupling, responsive to a first predetermined power level, s uch that the RF coupler (405) produces a first coupled RF signal (509) responsive to the RF signal (408) and a second operating mode of th e RF coupler (405) having weak coupling, responsive to a second predetermined power level, such that the RF coupler (405) produces a seco nd coupled RF signal (510) responsive to the RF signal (408).
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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.
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公开(公告)号：MX167091B
公开(公告)日：1993-03-03
申请号：MX1755289
申请日：1989-09-14
Applicant: MOTOROLA INC
Inventor： SCHWENT DALE GERARD
Abstract: An integral phase shifting network (215,216,217) of a transmitter filter (104) provides a means to reduce the size and increase the efficiency of an antenna coupling network. The network to shift the phase of the transmitter filter (104) is printed by depositing conductive material directly on a ceramic block (230) using low-loss circuit elements and can be tuned easily by removing conductive material if required in certain applications. By utilizing an integral phase shifting network (215,216,217), either transmit filter (104) or receive filter (112) having a highly reactive and capacitive out-of-band impedance in the receive or transmit band, respectively, can be connected to a common antenna port without external transmission lines.
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公开(公告)号：BR8907140A
公开(公告)日：1991-02-13
申请号：BR8907140
申请日：1989-09-22
Applicant: MOTOROLA INC
Inventor： SCHWENT DALE GERARD
Abstract: An integral phase shifting network (215,216,217) of a transmitter filter (104) provides a means to reduce the size and increase the efficiency of an antenna coupling network. The network to shift the phase of the transmitter filter (104) is printed by depositing conductive material directly on a ceramic block (230) using low-loss circuit elements and can be tuned easily by removing conductive material if required in certain applications. By utilizing an integral phase shifting network (215,216,217), either transmit filter (104) or receive filter (112) having a highly reactive and capacitive out-of-band impedance in the receive or transmit band, respectively, can be connected to a common antenna port without external transmission lines.
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