Patent ID: 7898469
Filing Date: 2011-03-01
Classification: H03D,H04B

Abstract:
1. A receiving device that is used for a spread spectrum radar apparatus and receives a spectrum-spread signal, said receiving device comprising: a signal receiving unit configured to receive the spectrum-spread signal as a reception signal; a despreading unit configured to generate a first despread signal and a second despread signal that are generated by despreading, using a pseudo-noise code, the reception signal received by said signal receiving unit, the second despread signal passing through a transmission line carrying a current having a current value identical to a current value of a current carried by a transmission line through which the first despread signal passes; and a quadrature demodulating unit configured to generate an in-phase signal by quadrature-demodulating the first despread signal, and a quadrature signal by quadrature-demodulating the second despread signal, wherein said despreading unit includes a first transistor pair including a first transistor and a second transistor, said first and second transistors having an identical characteristic, said first and second transistors receive the reception signal, and despread the received reception signal by being turned on and off according to the pseudo-noise code, subsequently said first transistor outputs the first despread signal, and said second transistor outputs the second despread signal, and said quadrature demodulating unit includes: a first demodulator that demodulates the first despread signal using a first local oscillator signal, and generates the in-phase signal; and a second demodulator that demodulates the second despread signal using a second local oscillator signal having a phase obtained by shifting a phase of the first local oscillator signal by 90 degrees, and generates the quadrature signal.