Title: Isolated DC amplifier circuit

Abstract: A DC amplifier circuit with transformer coupled isolation comprises a DC amplifier, an electronic switching element connected to the output terminal of the DC amplifier, a pulse generator for driving the electronic switching element, a small pulse transformer having a primary winding and secondary winding. To the primary winding of the small transformer pulsating signals from the electronic switching element are applied, and two substantially identical circuits each having a diode and a condenser in series are connected respectively across the primary winding and the secondary winding of the small pulse transformer. Means for feeding back the smoothed signals from the circuit across the primary winding of the small pulse transformer is connected to a negative input terminal of the DC amplifier.

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Inventors: Kato, Kazuo (Tohkai, JA)
Kamata, Yasuji (Hitachi, JA)

Application Number: 499794
Filing Date: 1974-08-22
Publication_date: 1976-01-06
Assignee: Hitachi, Ltd. (JA)
Primary Class(es): 330/10 330/97
Other Classes:
US Patent Ref:

3193773	Jul, 1965	Oglum et al.	330/10.
3825846	Jul, 1974	Grygera	330/10.
3835408	Sep, 1974	Shaffer	330/10.

Other Refs:
Primary Examiner: Mullins, James B.
Assistant Examiner:
Attorney: Craig & Antonelli