H - Electricity – 03 – K
Patent
H - Electricity
03
K
328/2, 332/35
H03K 3/353 (2006.01) G10H 1/057 (2006.01) G10H 5/00 (2006.01) H03K 3/00 (2006.01) H03K 4/02 (2006.01) H03K 5/003 (2006.01) H03K 6/00 (2006.01) H03L 5/00 (2006.01) H03L 7/00 (2006.01)
Patent
CA 1071717
Abstract of the Disclosure An arrangement which may be used for electronic musical instruments, for producing pulse-shaped signals whose amplitude is determined by a control voltage and the frequency and phase of which are determined by a switch pulse input signal, comprising a first transistor, the control voltage being applied to the control electrode. The main electrode is connected to a point of fixed potential via an impedance. The output current of the first transistor, which current is determined by the control voltage, is applied to an output in a pulse-shaped fashion by pulse interruption of that output current by means of an applied switch pulse input signal. In order to con- vert these unipolar current pulses into bipolar current pulses the arrange- ment includes a second transistor whose input circuit is connected in parallel with the input circuit of the first transistor. The output current of this second transistor is subtracted from the output current of the first tran- sistor by means of a current amplifier, the result being available at the output.
257356
Bahlmann Johannes P.m.
Zwijsen Wilhelmus A.j.m.
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