Boots – shoes – and leggings
Patent
1976-12-01
1978-01-31
Ruggiero, Joseph F.
Boots, shoes, and leggings
307234, 307265, 318341, 328 58, G06J 100, H02P 516
Patent
active
040719006
ABSTRACT:
The invention relates to a control unit for an inverted rectifier of the type having a constant DC voltage supply and a frequency settable by a frequency control signal. The main feature of the control unit relative to the invention hereof is the monitoring of the critical pulse spacings of the pulse generator output without the use of time-dependent elements. The control unit includes a voltage controlled oscillator for generating a triangular wave form controlled by a frequency control voltage. A variable width pulse generator is fed by the triangular wave form and is controlled by a pulse width control voltage. The control unit includes an analog computer for generating internally thereof a function which corresponds to the spacing of the pulses of the pulse generator. The computer includes an amplifier having a noninverting input for receiving a control signal which corresponds to the amplitude of the triangular wave form. The inverting input of the amplifier receives a combined signal corresponding to the frequency control voltage and the pulse width control voltage. The output of the computer is a digital signal which occurs when a critical predetermined value of the computer generated function is reached.
REFERENCES:
patent: 3743911 (1973-07-01), Erler
patent: 3783360 (1974-01-01), Bundy
patent: 3883756 (1975-05-01), Oragon
patent: 3952236 (1976-04-01), Hoover
patent: 3978424 (1976-08-01), Hobo et al.
Danfoss A/S
Ruggiero Joseph F.
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