Circuit for generating a triangular voltage

Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons

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Details

307246, 3072471, 307296R, 328181, H03K 486, H03K 1756

Patent

active

046510257

ABSTRACT:
A circuit for generating a triangular voltage (V.sub.c) across a capacitor (C) having a charging current source (1, 2) and a discharging current source (3, 4) for the capacitor (C). A comparison stage (11, 12, 13, 14) compares the generated voltage (V.sub.c) with a first and a second reference voltage, respectively, from a voltage divider (17, 18, 19) and controls the generation of a setting and a resetting signal, respectively, at a bistable switching element (20, 21) when the value of the first and the second reference voltage, respectively, is reached. The bistable element (20, 21) controls a switch (7, 8) which determines charging or discharging, respectively, of the capacitor (C). The circuit is suitable for high repetition rates because of the fact that a buffer stage (28) is connected to the capacitor (C) for deriving, under the control of the capacitor voltage (V.sub.c), a supply voltage for the bistable switching element (20, 21) which is of the same order of magnitude and varies in the same direction as the generated triangular voltage. Preferably, the switch (1, 8) and the bistable switching element (20, 21) do not employ pnp-transistors.

REFERENCES:
patent: 3553198 (1971-07-01), Karcher
patent: 3835402 (1974-05-01), Kublick
patent: 3862436 (1975-01-01), George
patent: 3893036 (1975-07-01), Cavoretto et al.
patent: 4393314 (1983-07-01), Kunze

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