公开(公告)号：AU3668301A

公开(公告)日：2001-09-03

申请号：AU3668301

申请日：2001-02-05

Applicant: MOTOROLA INC

Inventor： STENGEL ROBERT ,  BOCKELMAN DAVID E ,  BRUESKE DANIEL E

IPC: H03H11/16 ,  H03K3/00

Abstract: The invention produces an accurate quadrature relationship for a range of frequencies using passive components in the primary quadrature splitting circuits. A reference oscillator (202) generates a reference signal which is fed to a conventional passive quadrature splitter circuit (204). However, since the reference circuit provides signals over a range of frequencies, the output signals of the passive quadrature splitter may not have an accurate quadrature relationship. The output signals of the passive quadrature splitter are then equalized in magnitude, and the sum and difference of the signals are produced, which will be in an accurate quadrature relationship.

公开(公告)号：GB2319130A

公开(公告)日：1998-05-13

申请号：GB9723398

申请日：1997-11-05

Applicant: MOTOROLA INC

Inventor： BRUESKE DANIEL E

IPC: H04B1/04

Abstract: A wideband frilly integrated two-way radio transmitter (100) includes a voltage controlled oscillator (VCO) (101) for providing a voltage at a radio frequency. A divider (103) is used reducing the radio frequency (RF) signal from the VCO to an intermediate frequency. A voltage-to-current converter is used for changing the voltage of the intermediate frequency RF signal to an RF current. A transmit buffer is then used for amplifying the RF current supplied by the voltage-to-current converter for amplification by a power amplifier. The fully integrated current mode transmit buffer offers the advantage of amplification over a large bandwidth while providing isolation between the power amplifier and the VCO.

公开(公告)号：GB2319130B

公开(公告)日：1999-01-13

申请号：GB9723398

申请日：1997-11-05

Applicant: MOTOROLA INC

Inventor： BRUESKE DANIEL E

IPC: H04B1/04

Abstract: A wideband fully integrated two-way radio transmitter (100) includes a voltage controlled oscillator (VCO) (101) for providing a voltage at a radio frequency. A divider (103) is used reducing the radio frequency (RF) signal from the VCO to a an intermediate frequency. A voltage-to-current converter is used for changing the voltage of the intermediate frequency RF signal to an RF current. A transmit buffer is then used for amplifying the RF current supplied by the voltage-to-current converter for amplification by a power amplifier. The fully integrated current mode transmit buffer offers the advantage of amplification over a large bandwidth while providing isolation between the transmit buffer and the VCO.