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Double Frequency Pulse Amplifier

IP.com Disclosure Number: IPCOM000094408D
Original Publication Date: 1966-Oct-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 47K

Publishing Venue

IBM

Related People

Hanson, RE: AUTHOR

Abstract

Amplifier 10 provides two output pulses for each cycle input from generator 15 which is shown as a magnetic pulse generator. When the slope of the input waveform is zero, capacitor C2 is not being charged and transistor T1 is off. Transistor T2 is on, T3 is off and T4 is on. After the slope of the input signal goes positive a predetermined amount, i.e., above the junction drop, T1 switches on, T2 and T3 remain in the same state, and T4 switches off. Then the slope of the input again becomes zero and T1 switches off due to lack of base current flow. The states of T2 and T3 still remain the same. However, T4 switches on as T1 switches off. Then as the slope of the input goes negative, diodes D1 and D2 conduct and thus pull base current away from the base of T2 to switch it off. As T2 goes off, T3 turns on and T4 turns off.

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Double Frequency Pulse Amplifier

Amplifier 10 provides two output pulses for each cycle input from generator 15 which is shown as a magnetic pulse generator. When the slope of the input waveform is zero, capacitor C2 is not being charged and transistor T1 is off. Transistor T2 is on, T3 is off and T4 is on. After the slope of the input signal goes positive a predetermined amount, i.e., above the junction drop, T1 switches on, T2 and T3 remain in the same state, and T4 switches off. Then the slope of the input again becomes zero and T1 switches off due to lack of base current flow. The states of T2 and T3 still remain the same. However, T4 switches on as T1 switches off. Then as the slope of the input goes negative, diodes D1 and D2 conduct and thus pull base current away from the base of T2 to switch it off. As T2 goes off, T3 turns on and T4 turns off. Diode D3 protects the bases of T1 and T2 against large negative-going signals. Capacitor C1 makes 10 insensitive to RF noise and slightly tunes the LC circuit.

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