| 摘要 |
A modem transceiver circuit and method is disclosed, the transceiver circuit having a line drive transformer, a transmit circuit and a receive circuit. The receive circuit features a receive operational amplifier which is enabled when the voltage magnitude of a data signal received by the modem transceiver circuit is below a predetermined threshold. The receive operational amplifier is disabled when the voltage magnitude of the data signal is greater than or equal to the predetermined threshold. When enabled, the receive operational amplifier amplifies the data signal for further processing by other modem circuitry. When disabled, a series resistance comprising an input resistance and a feedback resistance attenuates the data signal for further processing by other modem circuitry.
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