Multi-band receiver having multi-slot capability

Claim 3

A method as claimed in claim 1 , wherein the first low frequency signal is generated in a 554.2-589.2 MHz bandwidth for GSM operation and in a 634.2-709.2 MHz bandwidth for DCS operation, and wherein the second low frequency signal has a fixed frequency of 770.8 MHz.

Claim 4

A method as claimed in claim 2 , wherein the first IF signal is mixed with the second low frequency signal to generate the output signal.

Claim 5

A method as claimed in claim 1 , wherein the traffic LO signal is generated in a 1325-1380 MHz bandwidth for GSM operation and in a 1405-1480 MHz bandwidth for DCS operation.

Claim 6

A method as claimed in claim 1 , wherein the Rx signal is received in a 925-960 MHz bandwidth for GSM operation and in an 1805-1880 MHz bandwidth for DCS operation.

Claim 7

A wireless communication device comprising: a microphone for capturing audio acoustic signals and converting the acoustic signals into electric signals; a speaker for converting electric signals into audio acoustic signals; an antenna for wireless transmission and reception of acoustic or data signals; a transmitter for transmitting acoustic or data signals over the antenna; a receiver comprising a high frequency oscillator that generates a traffic signal; two low frequency oscillators; a first mixer that mixes the signals from the two low frequency oscillators to generate a monitor signal; a switch that selects either the monitor or traffic signal; a second mixer that mixes a received signal from the antenna with either the traffic or monitor signal from the switch to generate an IF signal; and a third mixer that mixes the IF signal with a signal from one of the low frequency oscillators to generate an output signal; and a processor for directing operation of the communication device.

Claim 8

A wireless communication device comprising: a microphone for capturing audio acoustic signals and converting the acoustic signals into electric signals; a speaker for converting electric signals into audio acoustic signals; an antenna for wireless transmission and reception of acoustic or data signals; a transmitter for transmitting acoustic or data signals over the antenna; a receiver comprising a high frequency oscillator that generates a traffic signal; two low frequency oscillators; a first mixer that mixes the signals from the two low frequency oscillators to generate a monitor signal; a switch that selects either the monitor or traffic signal; a second mixer that mixes a received signal from the antenna with either the traffic or monitor signal from the switch to generate an IF signal; and a third mixer that mixes the IF signal with a signal from one of the low frequency oscillators to generate an output signal; and a processor for directing operation of the communication device.

Claim 9

A wireless communication device as claimed in claim 6 , wherein one of the low frequency oscillators has a variable frequency range and the other of the low frequency oscillators has a fixed frequency.

Claim 10

A receiver comprising: an antenna that receives an Rx signal a first oscillator that generates a relatively high frequency traffic LO signal; a second oscillator that generates a first relatively low frequency signal; a third oscillator that generates a second relatively low frequency signal; a first mixer that mixes the first and second relatively low frequency signals to produce a relatively high frequency monitor LO signal; a second mixer that mixes either the traffic or monitor LO signal with the Rx signal to produce a first IF signal; and a third mixer that mixes the first IF signal and the second relatively low frequency signal to produce an output signal.

Claim 11

A receiver comprising: an antenna that receives an Rx signal a first oscillator that generates a relatively high frequency traffic LO signal; a second oscillator that generates a first relatively low frequency signal; a third oscillator that generates a second relatively low frequency signal; a first mixer that mixes the first and second relatively low frequency signals to produce a relatively high frequency monitor LO signal; a second mixer that mixes either the traffic or monitor LO signal with the Rx signal to produce a first IF signal; and a third mixer that mixes the first IF signal and the second relatively low frequency signal to produce an output signal.

Claim 12

A receiver as claimed in claim 8 , wherein the first relatively low frequency signal has a frequency in a range of 554.2-589.2 MHz for GSM operation or 634.2-709.2 MHz for DCS operation.

Claim 13

A receiver as claimed in claim 8 , wherein the traffic LO signal has a frequency in a range of 1325-1380 MHz for GSM operation or 1405-1480 MHz for DCS operation.

Claim 14

A receiver as claimed in claim 8 , wherein the second mixer operates in high-side injection mode for GSM operation and in low-side injection mode for DCS operation.

Claim 15

A receiver as claimed in claim 8 , wherein the Rx signal has a frequency in a range of 925-960 MHz for GSM operation or 1805-1880 MHz for DCS operation.

Claim 16

A receiver as claimed in claim 8 , wherein the second relatively low frequency signal has a fixed frequency of 770.8 MHz.

Claim 17

A receiver as claimed in claim 1 , and further comprising a switch for switching between the traffic and monitor LO signals.

Claim 18

A receiver as claimed in claim 14 , wherein the switch comprises a pin diode.

Claim 19

A receiver as claimed in claim 8 , wherein the first mixer performs an upconversion to produce the monitor LO signal.

Claim 20

A receiver as claimed in claim 8 , wherein the output signal is a second IF signal having a frequency of 14.6 MHz.

Claim 21

A receiver as claimed in claim 8 , wherein the first IF signal has a frequency of 400 MHz.