SA1638BE transceiver equivalent, low voltage if i/q transceiver.
* Fully compatible with SA1620 GSM RF front-end (see Figure 9)
APPLICATIONS
* Direct supply: 3.3V to 7.5V
* Two DC regulators giving 3.0V output
* Low c.
* Direct supply: 3.3V to 7.5V
* Two DC regulators giving 3.0V output
* Low current consumption: 18mA for Rx.
The SA1638 is a combined Rx and Tx IF I/Q circuit. The receive path contains an IF amplifier, a pair of quadrature down-mixers, and a pair of baseband filters and amplifiers. A second pair of mixers in the transmit path transposes a quadrature baseba.
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