Browse Prior Art Database

Slope Discriminator

IP.com Disclosure Number: IPCOM000097557D
Original Publication Date: 1961-Feb-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

Clapper, GL: AUTHOR

Abstract

The circuit discriminates between waveforms on the basis of slope. Input waveforms are supplied to one electrode of capacitor C1. The other electrode of C1 is connected to the emitter of transistor T1, as well as a biasing circuit including resistor R1, diode D1, resistor R2 and adjustable resistor R3. The collector of T1 is connected to the base of a transistor T2, with a biasing potential applied via resistor R4. The emitter of T2 is connected to ground and its collector is connected to the output terminal, as well as the negative potential terminal -12 via resistor R5.

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Slope Discriminator

The circuit discriminates between waveforms on the basis of slope. Input waveforms are supplied to one electrode of capacitor C1. The other electrode of C1 is connected to the emitter of transistor T1, as well as a biasing circuit including resistor R1, diode D1, resistor R2 and adjustable resistor R3. The collector of T1 is connected to the base of a transistor T2, with a biasing potential applied via resistor R4. The emitter of T2 is connected to ground and its collector is connected to the output terminal, as well as the negative potential terminal -12 via resistor R5.

Feedback to T1 is provided by the circuit including resistor R6, capacitor C2 and resistor R7. The circuit is adjusted so that when a waveform having a leading slope greater than a predetermined value is supplied to the circuit, the capacitor displacement current is great enough to overcome the bias on T2 and the transistor conducts and provides an output signal. Regenerative feedback provides a full output for slopes near the threshold value.

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