| 摘要 |
<p>The present invention provides an improved single chip radio receiver which has less external components than do previous similar receivers. With the present invention the integrated circuit (110) which includes the radio receiver (110A) also has an on-chip adaptive filter (110C). The radio receiver (110A) is designed for use in a radio pager which is only active for a very short time slot during a relative long repeat cycle. Thus the adaptive filter (110C) only need remain stable for a short period after its coefficients are adjusted to the desired values. The radio receiver (110A) includes an external filter (111) which has the same frequency response as desired from the adaptive filter (110C). Immediately prior to activating the radio receiver (110A), the circuit (112) is activated to adjust the parameters of the adaptive filter (110C) so that the adaptive filter (110C) matches the external filter (111). The radio receiver (110A) is then activated using both filters in series thereby producing the desired radio reception.</p> |
