公开(公告)号：JP2000165149A

公开(公告)日：2000-06-16

申请号：JP32638699

申请日：1999-11-17

Applicant: MOTOROLA INC

Inventor： HUFFORD CURT ,  SKUTTA FRANK

IPC: H03D7/16 ,  H03D7/12 ,  H04B1/16 ,  H04B1/26

Abstract: PROBLEM TO BE SOLVED: To reduce the number of components and space factor by linking a third terminal of a first transistor element and a third terminal of a second transistor element with multiple band mixer output and linking the first and second transistor elements to output an intermediate frequency signal by responding to communication signals in first and second frequency bands. SOLUTION: Collector terminals of the transistor elements 313, 324 are connected with the output 104 via a filtering circuit 204 to pass only the intermediate signal. Regarding a filtering circuit 206, an inductor 336 and a capacitor 338 are serial resonance circuits in injected frequency and become comparatively low impedance in communication signal frequency. Output frequency of an inductor 337 is antiresonant in the multiple band mixer output 104. A GSM mixer is matched to be 50-ohm by a capacitor 312 and an inductor 310. A capacitor 308 and the inductor 310 are close to serial resonance in the output frequency.

公开(公告)号：DE19954257A1

公开(公告)日：2000-06-08

申请号：DE19954257

申请日：1999-11-11

Applicant: MOTOROLA INC

Inventor： HUFFORD CURT ,  SKUTTA FRANK

IPC: H03D7/16 ,  H03D7/12 ,  H04B1/16 ,  H04B1/26

Abstract: A multiple band mixer (204) includes at least one transistor element (313, 324, 400). A single local oscillator provides a signal to one terminal of the at least one transistor element. The communication signals for each frequency band is input to the at least one transistor element at another terminal. A third terminal of the at least one transistor element is connected to the output.

公开(公告)号：DE19954257B4

公开(公告)日：2004-06-03

申请号：DE19954257

申请日：1999-11-11

Applicant: MOTOROLA INC

Inventor： HUFFORD CURT ,  SKUTTA FRANK

IPC: H03D7/16 ,  H03D7/12 ,  H04B1/16 ,  H04B1/26

Abstract: A multiple band mixer (204) includes at least one transistor element (313, 324, 400). A single local oscillator provides a signal to one terminal of the at least one transistor element. The communication signals for each frequency band is input to the at least one transistor element at another terminal. A third terminal of the at least one transistor element is connected to the output.

公开(公告)号：BR9905729A

公开(公告)日：2001-01-16

申请号：BR9905729

申请日：1999-11-23

Applicant: MOTOROLA INC

Inventor： HUFFORD CURT ,  SKUTTA FRANK

IPC: H03D7/16 ,  H03D7/12 ,  H04B1/16 ,  H04B1/26 ,  H01L29/86

Abstract: A multiple band mixer (204) includes at least one transistor element (313, 324, 400). A single local oscillator provides a signal to one terminal of the at least one transistor element. The communication signals for each frequency band is input to the at least one transistor element at another terminal. A third terminal of the at least one transistor element is connected to the output.

公开(公告)号：GB2344236A

公开(公告)日：2000-05-31

申请号：GB9926092

申请日：1999-11-03

Applicant: MOTOROLA INC

Inventor： HUFFORD CURT ,  SKUTTA FRANK ROBERT

IPC: H03D7/16 ,  H03D7/12 ,  H04B1/16 ,  H04B1/26 ,  H03J5/24

Abstract: In a mobile phone, separate mixer transistors 313 and 324 are provided for the GSM and DCS bands (900 MHz and 1.8 GHz). A single local oscillator, which may be controlled to provide an output at 1.3GHz or 1.4GHz, provides a signal to the emitter of each mixer transistor. The communication signals are applied to the respective base terminals, and the collector terminals are coupled to a common IF filter 206. Filter 203 in the emitter circuit provides a low impedance to the RF and IF frequencies. Alternatively (figure 4), the GSM and DCS signals may be combined in a diplexer arrangement (402,404) and fed to a single mixer transistor (400). MOSFETs or FETs may be used instead of bipolar transistors.

公开(公告)号：GB2344236B

公开(公告)日：2001-05-30

申请号：GB9926092

申请日：1999-11-03

Applicant: MOTOROLA INC

Inventor： HUFFORD CURT ,  SKUTTA FRANK ROBERT

IPC: H03D7/16 ,  H03D7/12 ,  H04B1/16 ,  H04B1/26 ,  H03J5/24

Abstract: A multiple band mixer (204) includes at least one transistor element (313, 324, 400). A single local oscillator provides a signal to one terminal of the at least one transistor element. The communication signals for each frequency band is input to the at least one transistor element at another terminal. A third terminal of the at least one transistor element is connected to the output.