Patent ID: 8489014

Claim:
An information processing terminal system comprising: an information processing terminal; and a transmitting and receiving unit which can be attached to or detached from said information processing terminal, wherein said transmitting and receiving unit comprises: a transmission and reception processing section; which is a high frequency processing unit; a demodulation section; a modulation section; and a baseband processing section, when said transmitting and receiving unit is attached to said information processing terminal, said transmission and reception processing section outputs a reception modulation wave signal from a network to said demodulation section and transmits a transmission modulation wave signal from said modulation section to the network, said demodulation section converts the reception modulation wave signal from said transmission and reception processing section into a reception analog baseband signal, said baseband processing section converts the reception analog baseband signal into a reception digital signal to output to said information processing terminal, and converts a transmission digital signal from said information processing terminal into a transmission analog baseband signal, said modulation section converts the transmission analog baseband signal into the transmission modulation wave signal, said baseband processing section and said information processing terminal operate in synchronization with a clock, and the reception digital signal contains a reception data, and the transmission digital signal contains a transmission data.