Receiver, in particular for mobile radio
View Patent ↗A receiver, in particular for mobile radio, includes a receiver branch with a mixer, downstream of an analog/digital converter. A reference generator generates a reference clock, which is fed to the converters or PLL synthesizers of the mixer by integral multiplication or division. As a result, a particularly energy-saving and space-saving circuit configuration is realized, which has a low level of mutual interference between the signals and is suitable (in particular for Universal Mobile Telecommunication System, UMTS). In a preferred embodiment, the receiver is developed into a transceiver by providing a transmission path.
1. A transceiver, comprising:
a first mixer having an input for receiving a reception signal and an output for tapping a first intermediate frequency signal;
a first phase locked loop for receiving a first mixer clock and connected to said first mixer;
an analog/digital converter connected to said output of said mixer for receiving a first converter clock;
a reference generator for generating a reference clock, the reference clock being an integral multiple of the first mixer clock, and the first converter clock being an integral multiple of the reference clock;
a second mixer having an input for receiving a second intermediate frequency signal and an output for tapping a transmission signal;
a second phase locked loop for receiving a second mixer clock and connected to said second mixer; and
a digital/analog converter connected to said input of said second mixer for receiving a second converter clock, the reference clock being an integral multiple of the second mixer clock, and the second converter clock being an integral multiple of the reference clock.
2. The transceiver according to claim 1 , wherein:
the first mixer clock is equal to the second mixer clock; and
the first converter clock is equal to the second converter clock.
3. The transceiver according to claim 1 , further comprising:
a first digital mixer connected downstream of said analog/digital converter;
a first interpolator connected downstream of said first digital mixer;
a second digital mixer connected upstream of said digital/analog converter; and
a sacond interpolator connected upstream of said second digital mixer.
4. The transceiver according to claim 3 , wherein each of said first and second interpolators has a plurality of sub-interpolators configured in series.
5. The transceiver according to claim 1 , wherein:
said analog/digital converter has a first digital filter; and
said digital/analog converter includes a second digital filter.
6. The transceiver according to claim 1 , wherein the reference clock has a clock frequency of substantially 13 MHz.
7. The transceiver according to claim 1 , wherein the reference clock has a clock frequency of substantially 40 MHz.
8. The transceiver according to claim 1 , wherein the converter clocks are substantially equal to the reference clock.
9. A transceiver for mobile radio, comprising:
a first mixer having an input for receiving a reception signal and an output for tapping a first intermediate frequency signal;
a first phase locked loop for receiving a first mixer clock and connected to said first mixer;
an analog/digital converter connected to said output of said mixer for receiving a first converter clock;
a reference generator for generating a reference clock, the reference clock being an integral multiple of the first mixer clock, and the first converter clock being an integral multiple of the reference clock;
a second mixer having an input for receiving a second intermediate frequency signal and an output for tapping a transmission signal;
a second phase locked loop for receiving a second mixer clock and connected to said second mixer; and
a digital/analog converter connected to said input of said second mixer for receiving a second converter clock, the reference clock being an integral multiple of the second mixer clock, and the second converter clock being an integral multiple of the reference clock.