Dual band transceiver

Claim 2

A dual band transmitter for transmitting a data signal in a first lower frequency band or a second higher frequency band, the dual band transmitter comprising: a first oscillating means for generating a local oscillator (LO) signal; a second oscillating means for generating an offset frequency (OF) signal; a first mixing means for combining said LO signal with said OF signal to produce a first transmit signal; modulation means for modulating said first transmit signal with said data signal to produce a first data modulated transmit signal; a second mixing means for combining said first data modulated transmit signal with said LO signal to produce a second data modulated transmit signal; means for programming said first oscillating means and said second oscillating means such that said first data modulated transmit signal is in said first band and said second data modulated transmit signal is in said second band; and means for transmitting said first data modulated transmit signal when transmitting in said first band, and for transmitting said second data modulated transmit signal when transmitting in said second band.

Claim 3

The dual band transmitter of claim 1 wherein said first band is a transmit band used by cellular systems, and said second band is a transmit band used by personal communication services (PCS) systems.

Claim 4

The dual band transmitter of claim 2 wherein said cellular transmit band extends from 824 MHz to 849 MHz and said PCS transmit band extends from 1850 MHz to 1910 MHz.

Claim 5

The dual band transmitter of claim 3 wherein said LO signal is selectively set to a frequency between 980 MHz and 1050 MHz, and said OF signal is set to 155.52 MHz when transmitting in said cellular transmit band and reset to 190.56 MHz when transmitting in said PCS transmit band.

Claim 6

The dual band transmitter of claim 3 wherein said OF signal is set to 155.52 MHz when transmitting in either said cellular transmit band or said PCS transmit band.

Claim 7

A dual band transmitter for transmitting a data signal in a first lower frequency band or a second higher frequency band, the dual band transmitter comprising: a first oscillating means for generating a local oscillator (LO) signal; a second oscillating means for generating an offset frequency (OF) signal; modulation means for modulating one of said LO signal and said OF signal with said data signal to produce a data modulated signal; a first mixing means for combining the other of said LO signal and said OF signal with said data modulated signal to produce a first data modulated transmit signal; a second mixing means for combining said first data modulated transmit signal with said LO signal to produce a second data modulated transmit signal; means for programming said first oscillating means and said second oscillating means such that said first data modulated transmit signal is in said first band and said second data modulated transmit signal is in said second band; and means for transmitting said first data modulated transmit signal when transmitting in said first band, and for transmitting said second data modulated transmit signal when transmitting in said second band.

Claim 8

A dual band transmitter for transmitting a data signal in a first lower frequency band or a second higher frequency band, the dual band transmitter comprising: a first oscillating means for generating a local oscillator (LO) signal; a second oscillating means for generating an offset frequency (OF) signal; modulation means for modulating one of said LO signal and said OF signal with said data signal to produce a data modulated signal; a first mixing means for combining the other of said LO signal and said OF signal with said data modulated signal to produce a first data modulated transmit signal; a second mixing means for combining said first data modulated transmit signal with said LO signal to produce a second data modulated transmit signal; means for programming said first oscillating means and said second oscillating means such that said first data modulated transmit signal is in said first band and said second data modulated transmit signal is in said second band; and means for transmitting said first data modulated transmit signal when transmitting in said first band, and for transmitting said second data modulated transmit signal when transmitting in said second band.

Claim 9

The dual band transmitter of claim 6 wherein said first band is a transmit band used by cellular systems, and said second band is a transmit band used by personal communication services (PCS) systems.

Claim 10

The dual band transmitter of claim 7 wherein said cellular transmit band extends from 824 MHz to 849 MHz and said PCS transmit band extends from 1850 MHz to 1910 MHz.

Claim 11

The dual band transmitter of claim 8 wherein said LO signal is selectively set to a frequency between 980 MHz and 1050 MHz, and said offset frequency signal is set to 155.52 MHz when transmitting in said cellular transmit band and reset to 190.56 MHz when transmitting in said PCS transmit band.

Claim 12

The dual band transmitter of claim 8 wherein said OF signal is set to 155.52 MHz when transmitting in either said cellular transmit band or said PCS transmit band.

Claim 13

A dual band mobile station capable of operating in a first lower frequency band or a second higher frequency band, and comprising: means for detecting an analog voice signal; means for processing said analog voice signal into a digital baseband data signal; and dual band transmitting means for transmitting said baseband data signal in said first band or said second band, the dual band transmitting means including: a first oscillating means for generating a local oscillator (LO) signal; a second oscillating means for generating an offset frequency (OF) signal; a first mixing means for combining said LO signal with said OF signal to produce a first transmit signal; modulation means for modulating said first transmit signal with said baseband data signal to produce a first data modulated transmit signal; a second mixing means for combining said first data modulated transmit signal with said LO signal to produce a second data modulated transmit signal; means for programming said first oscillating means and said second oscillating means such that said first data modulated transmit signal is in said first band and said second data modulated transmit signal is in said second band; and means for transmitting said first data modulated transmit signal when transmitting in said first band, and for transmitting said second data modulated transmit signal when transmitting in said second band.

Claim 14

A dual band mobile station capable of operating in a first lower frequency band or a second higher frequency band, and comprising: means for detecting an analog voice signal; means for processing said analog voice signal into a digital baseband data signal; and dual band transmitting means for transmitting said baseband data signal in said first band or said second band, the dual band transmitting means including: a first oscillating means for generating a local oscillator (LO) signal; a second oscillating means for generating an offset frequency (OF) signal; a first mixing means for combining said LO signal with said OF signal to produce a first transmit signal; modulation means for modulating said first transmit signal with said baseband data signal to produce a first data modulated transmit signal; a second mixing means for combining said first data modulated transmit signal with said LO signal to produce a second data modulated transmit signal; means for programming said first oscillating means and said second oscillating means such that said first data modulated transmit signal is in said first band and said second data modulated transmit signal is in said second band; and means for transmitting said first data modulated transmit signal when transmitting in said first band, and for transmitting said second data modulated transmit signal when transmitting in said second band.

Claim 15

The mobile station of claim 11 further comprising dual band receiving means for receiving a data modulated signal in said first or second band, the dual band receiving means including: a third mixing means for combining said received first band signal with said LO signal; a frequency multiplier for upconverting said LO signal; and a fourth mixing means for combining said received second band signal with said upconverted LO signal.

Claim 16

The mobile station of claim 12 wherein said first band comprises a transmit band and a receive band allocated to cellular systems, and said second band comprises a transmit band and a receive band allocated to personal communication services (PCS) systems.

Claim 17

The mobile station of claim 13 wherein said cellular transmit band extends from 824 MHz to 849 MHz, said cellular receive band extends from 869 MHz to 894 MHz, said PCS transmit band extends from 1850 MHz to 1910 MHz, and said PCS receive band extends from 1930 MHz to 1990 MHz.

Claim 18

The mobile station of claim 14 wherein said frequency multiplier is a frequency doubler.

Claim 19

A dual band mobile station capable of operating in a first lower frequency band or a second higher frequency band, and comprising: means for detecting an analog voice signal; means for processing said analog voice signal into a digital baseband data signal; and dual band transmitting means for transmitting said baseband data signal in said first band or said second band, the dual band transmitting means including: a first oscillating means for generating a local oscillator (LO) signal; a second oscillating means for generating an offset frequency (OF) signal; modulation means for modulating one of said LO signal and said OF signal with said baseband data signal to produce a data modulated signal; a first mixing means for combining the other of said LO signal and said OF signal with said data modulated signal to produce a first data modulated transmit signal; a second mixing means for combining said first data modulated transmit signal with said LO signal to produce a second data modulated transmit signal; means for programming said first oscillating means and said second oscillating means such that said first data modulated transmit signal is in said first band and said second data modulated transmit signal is in said second band; and means for transmitting said first data modulated transmit signal when transmitting in said first band, and for transmitting said second data modulated transmit signal when transmitting in said second band.

Claim 20

A dual band mobile station capable of operating in a first lower frequency band or a second higher frequency band, and comprising: means for detecting an analog voice signal; means for processing said analog voice signal into a digital baseband data signal; and dual band transmitting means for transmitting said baseband data signal in said first band or said second band, the dual band transmitting means including: a first oscillating means for generating a local oscillator (LO) signal; a second oscillating means for generating an offset frequency (OF) signal; modulation means for modulating one of said LO signal and said OF signal with said baseband data signal to produce a data modulated signal; a first mixing means for combining the other of said LO signal and said OF signal with said data modulated signal to produce a first data modulated transmit signal; a second mixing means for combining said first data modulated transmit signal with said LO signal to produce a second data modulated transmit signal; means for programming said first oscillating means and said second oscillating means such that said first data modulated transmit signal is in said first band and said second data modulated transmit signal is in said second band; and means for transmitting said first data modulated transmit signal when transmitting in said first band, and for transmitting said second data modulated transmit signal when transmitting in said second band.

Claim 21

The mobile station of claim 16 further comprising dual band receiving means for receiving a data modulated signal in said first or second band, the dual band receiving means including: a third mixing means for combining said received first band signal with said LO signal; a frequency multiplier for upconverting said LO signal; and a fourth mixing means for combining said received second band signal with said upconverted LO signal.

Claim 22

The mobile station of claim 17 wherein said first band comprises a transmit band and a receive band allocated to cellular systems, and said second band comprises a transmit band and a receive band allocated to personal communication services (PCS) systems.

Claim 23

The mobile station of claim 18 wherein said cellular transmit band extends from 824 MHz to 849 MHz, said cellular receive band extends from 869 MHz to 894 MHz, said PCS transmit band extends from 1850 MHz to 1910 MHz, and said PCS receive band extends from 1930 MHz to 1990 MHz.

Claim 24

The mobile station of claim 19 wherein said frequency multiplier is a frequency doubler.

Claim 27

The method of claim 21 wherein said first data modulated transmit signal is filtered before being mixed with said LO signal to produce said second data modulated transmit signal.

Claim 28

The method of claim 22 wherein said first band is in the 800 MHz range and said second band is in the 1900 MHz range.

Claim 29

The method of claim 23 wherein said LO signal is selectively set to a frequency between 980 MHz and 1050 MHz, and said OF signal is set to 155.52 MHz when transmitting in said first band and reset to 190.56 MHz when transmitting in said second band.

Claim 30

The method of claim 23 wherein said OF signal is set to 155.52 MHz when transmitting in either said first band or said second band.

Claim 33

The method of claim 26 wherein said first data modulated transmit signal is filtered before being mixed with said LO signal to produce said second data modulated transmit signal.

Claim 34

The method of claim 27 wherein said first band is in the 800 MHz range and said second band is in the 1900 MHz range.

Claim 35

The method of claim 28 wherein said LO signal is selectively set to a frequency between 980 MHz and 1050 MHz, and said OF signal is set to 155.52 MHz when transmitting in said first band and reset to 190.56 MHz when transmitting in said second band.

Claim 36

The method of claim 28 wherein said OF signal is set to 155.52 MHz when transmitting in either said first band or said second band.