Abstract: 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 (T.sub.1, T.sub.2), which are arranged as a differential pair and whose collectors (9, 10) are coupled to the positive supply-voltage terminal (5). A voltage divider (R.sub.x, R.sub.y) with a tap (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 tap (11) and the unattenuated signal is available on the collector (9). The attenuated signal is applied to input (20) through an emitter-follower (T.sub.4) and the unattenuated signal is applied to input (21) of the comparator (3) through an emitter-follower (T.sub.3) 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).

Abstract: A transconductance amplifier includes a differential amplifier, whose collector load is a current mirror having a current output. A current-source transistor arranged in the common emitter line supplies a current having a positive temperature-dependence. This current is obtained from a current-stabilizing circuit. By means of a voltage divider a fraction of a temperature-independent voltage is applied between the control electrodes of the differential amplifier, which voltage is taken from a voltage-stabilizing circuit. Depending on the value of this fraction, the output current is temperature-independent or has a negative temperature-dependence.