Programmable triangle wave generator

Details Programmable triangle wave generator Programmable triangle wave generator

H - Electricity

03

K

328/35

H03K 6/00 (2006.01) H03K 4/06 (2006.01)

Patent

CA 2000673

PROGRAMMABLE TRIANGLE WAVE GENERATOR ABSTRACT A triangle wave generator (10) which is programmable, and which provides variable amplitude. frequency independent, triangle waves over a wide frequency bandwidth while employing a low voltage power source. The triangle wave genera- tor (10) comprises a square wave input signal source (12) and a reference voltage sig- nal source (14). A first amplifier (16) amplifies the square wave input signals and couples them by way of a transformer (34) to an integrator (36, 40) which generates triangle wave output signals in response thereto. A second amplifier (18) connected to the triangle wave signal and to the transformer coupled square wave current source for the purpose of providing a bootstrap. A third amplifier (20) samples and com- pares the triangle wave output signals to the reference voltage signals and generates output error signals in response thereto. A driver circuit (22) responds to the output error signals and provides bias voltage signals to the first amplifier (16) that controls the amplitude of the square wave output signals in proportion to the amplitude of the reference voltage signals. The triangle waves are controlled in a manner to cause their amplitude to be proportional to the amplitude of the reference voltage signals and independent of the frequency of the square wave input signals. The triangle wave generator (10) produces a 20 volt peak-to-peak amplitude triangle wave at at frequencies greater than 300 KHz utilizing a conventional ?15 volt power supply source. A nonprogrammable, fixed frequency embodiment and a method of produc- ing triangle wave signals are also disclosed.

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