| 摘要 |
<p>A frequency-to-phase converter comprises an attenuator circuit (1), a delay circuit (2) and a comparator (3). The attenuator circuit (1) is provided with two transistors (T1, T2), which are arranged as a differential pair and whose collectors (9,10) are coupled to the positive supply-voltage terminal (5). A voltage divider (Rx, Ry) with a tapping (11) is arranged between the collectors (9,10). If a signal is applied to the input terminal (4), the attenuated signal is available on the tapping (11) and the unattenuated signal is available on the collector (9). The attenuated signal is applied to input (20) via an emitter-follower (T4) and the unattenuated signal is applied to input (21) of the comparator (3) via an emitter-follower (T3) and a delay circuit (2). A signal, whose different frequencies are delayed by the same time over a wide frequency range appears on the output (22).</p> |
