Patent ID: 11942948
Assignee: TOPCON POSITIONING SYSTEMS, INC.
Field: Measurement (Instruments)
Classification: CPC H  G | IPC G  H

Claim 10:
11. The apparatus of claim 8, the interface further comprising:
(1) a first DAC and a second DAC, the second DAC configured to operate at a clock speed with a half-period delay relative to the first DAC;
(2) a splitter with two quadrature inputs and two quadrature outputs configured to convert mixer quadrature outputs of the first modulator and the second modulator, the quadrature outputs of the splitter are connected to the inputs of the first DAC and the second DAC; and
(3) a module of analog addition of two quadrature signals from the two DAC to obtain a single quadrature signal,
wherein the splitter converting the quadrature outputs of the mixers such that after addition of the outputs of the mixers a signal shaped as a signal with double DAC clock rate is generated and, in this signal, the even samples are samples from the mixer outputs of one modulator, and the odd samples are the mixer outputs of another modulator, the output of the analog addition module is connected to the RF front-end, the output of the RF front-end is connected to a transmitting antenna, and the entire device is part of a transmitter of local positioning signals.