| 摘要 |
An IR transceiver having a receiver chain with an isolated analog output, provides a transmission gate and unity gain buffer interposed between the amplifier output and an analog output pad. The transmission gate behaves as a switch, passing the analog output signal to the analog output pad only when an analog output is required. The unity gain buffer has a high input resistance, a low input capacitance, a unit gain and a low output impedance, so that the load of a DSP device or measuring instrument on the analog output pad is isolated and does not affec t the performance of the receiver chain. Since the transfer rates of the transmission gate and the buffer are each a unity, the analog output pad provides a high fidelity analog output signal to the outpu t buffer.
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