Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1989-01-26
1990-07-24
Miller, Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307491, 307494, 307455, 307520, 328165, 328167, 323316, H03K 500, G06G 710, G05F 316
Patent
active
049437364
ABSTRACT:
A waveform converting apparatus includes a first and a second common-emitter type transistors as part of a first and second emitter follower circuits respectively. The follower circuits are used for converting the impedances of an input signal independently. A first constant current supply is connected to the emitter of the first transistor provided in the first emitter follower circuit, and a second constant current supply is connected to the emitter of the second transistor provided in the second emitter follower circuit. The constant current flowing in the first emitter follower circuit is adjusted to be of a smaller value than the constant current flowing in the second emitter follower circuit. With this difference in current value there is a difference between the base-emitter voltage of the first transistor in the first emitter follower circuit and the base-emitter voltage of the second transistor in the second emitter follower circuit on the basis of the ratio of the first and second constant currents mentioned above. Also with the above described difference in currents a ceramic chip capacitor can be used in an integrating circuit of the converting apparatus.
REFERENCES:
patent: 4283673 (1981-08-01), Lieux
patent: 4302719 (1981-11-01), Mattfeld
patent: 4651038 (1987-03-01), Cline et al.
patent: 4734598 (1988-03-01), Bohme
patent: 4740766 (1988-04-01), Metz
Kihara Seiichiro
Okabayashi Naonori
Miller Stanley D.
Phan Trong Quang
Sharp Kabushiki Kaisha
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