公开(公告)号：DE4411733A1

公开(公告)日：1994-11-03

申请号：DE4411733

申请日：1994-04-05

Applicant: MOTOROLA INC

Inventor： HIETALA ALEXANDER W ,  STOCKSTAD TROY L ,  VYNE ROBERT L

IPC: H04B1/18 ,  H03D1/02 ,  H03D1/10 ,  H03D1/18 ,  H04B1/40 ,  H04B1/04 ,  H03G3/30 ,  H04B1/38

Abstract: A TC controlled RF signal detecting circuitry (211) used in the output power control circuit of a TDMA RF signal power amplifier includes positive coefficient current source (303) producing current I+ having a positive TC, negative coefficient current source (305) producing current I- having a negative TC, and current mirror (301) for summing currents I+ and I- to produce substantially identical compensated mirror currents Im1 and Im2. Anti-clamping current mirror (309) mirrors current Im2 to produce compensated currents Ia1 and Ia2, which are applied to and bias a Schottky diode coupled in series to a resistor network in each leg of diode detector (311). Each leg of diode detector (311) has a positive TC, which is substantially offset by the negative TC of compensated currents Ia1 and Ia2. Schottky diode (431) in one leg of diode detector (311) half-wave rectifies RF feedback signal (212) to produce temperature and voltage compensated power level signal (229), which has a DC level proportional to the output power level of RF output signal (214). By using TC controlled RF signal detecting circuitry (211), power level signal (229) has a DC level which is stable to within 5 mV over temperature ranging from -55 DEG C. to +125 DEG C. and over power supply voltage ranging from 2.7 V to 4.75 V.

公开(公告)号：FR2703860A1

公开(公告)日：1994-10-14

申请号：FR9403657

申请日：1994-03-29

Applicant: MOTOROLA INC

Inventor： HIETALA ALEXANDER W ,  STOCKSTAD TROY L ,  VYNE ROBERT L

IPC: H04B1/18 ,  H03D1/02 ,  H03D1/10 ,  H03D1/18 ,  H04B1/40

Abstract: A TC controlled RF signal detecting circuitry (211) used in the output power control circuit of a TDMA RF signal power amplifier includes positive coefficient current source (303) producing current I+ having a positive TC, negative coefficient current source (305) producing current I- having a negative TC, and current mirror (301) for summing currents I+ and I- to produce substantially identical compensated mirror currents Im1 and Im2. Anti-clamping current mirror (309) mirrors current Im2 to produce compensated currents Ia1 and Ia2, which are applied to and bias a Schottky diode coupled in series to a resistor network in each leg of diode detector (311). Each leg of diode detector (311) has a positive TC, which is substantially offset by the negative TC of compensated currents Ia1 and Ia2. Schottky diode (431) in one leg of diode detector (311) half-wave rectifies RF feedback signal (212) to produce temperature and voltage compensated power level signal (229), which has a DC level proportional to the output power level of RF output signal (214). By using TC controlled RF signal detecting circuitry (211), power level signal (229) has a DC level which is stable to within 5 mV over temperature ranging from -55 DEG C. to +125 DEG C. and over power supply voltage ranging from 2.7 V to 4.75 V.

公开(公告)号：HK77792A

公开(公告)日：1992-10-23

申请号：HK77792

申请日：1992-10-15

Applicant: MOTOROLA INC

Inventor： VYNE ROBERT L

IPC: H01L29/167 ,  H01L29/44

公开(公告)号：GB2244404A

公开(公告)日：1991-11-27

申请号：GB9109224

申请日：1991-04-29

Applicant: MOTOROLA INC

Inventor： FELDBAUMER DAVID W ,  VYNE ROBERT L

IPC: G06F13/00 ,  G06F3/00 ,  H03H11/28

Abstract: An active integrated termination circuit for providing a predetermined impedance at an output includes first and second resistors each having one end of which is commonly connected to the output. A first switching element is coupled between the other end of the first resistor and a first power supply conductor and is responsive to control signals for selectively coupling and de-coupling the first resistor to the first power supply conductor. A second switching element is coupled between the other end of the second resistor and a second power supply conductor and is responsive to the control signals for selectively coupling and de-coupling the second resistor to the second power supply conductor. The first and second resistors are polycrystalline silicon resistors and are trimmed to predetermined values by pulsing a high current unilaterally therethrough.