| 摘要 |
A bandpass amplifier for use in a communication szstem is described. The amplifier includes first and second first-order filters (311, 312), a quantizer (52), and a driver (54). In one embodiment, the first and second first-order filters are coupled in series. The first multiplier multiplies a signal from the first first-oder filter by a coefficient k1, and the second multiplier multiplies a signal from the first first-order filter by a coefficient k1, and the second multiplier multiplies a signal from the second first-order filter by a coefficient k2. The quantizer quantizes a summation of the signals from the first and second multipliers into one of two values, thereby generating a quantized signal. The driver amplifies the quantized signal, and generates an output signal. At least on of the coefficients k1 and k2 is adjusted based on a level of the output signal. |
