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US 4,395,682 AGranted
Differential output circuit
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsNobuyoshi Yokobori, Tetsuo Maeda, Yoshiaki Igarashi
Life of this patent
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Abstract
A differential output circuit for generating a bipolar DC current for an armature winding without requiring a bipolar power source. A combination of transistors and resistors are utilized to effectively apply a bipolar driving current. The use of only transistors and resistors in the differential output circuit enables its easy implementation as an integrated circuit.
Claims5
A differential output circuit comprising:
- a two-phase differential amplifier which has a first output which changes its output voltage in response to a voltage applied to a first input and has a second output which changes its output voltage in response to a voltage applied to a second input, said differential amplifier being driven by a single power source;
- a load which is connected between said first and second outputs, said first output and first input being connected together by a first negative feedback resistor, said second output and second input being connected together by a second negative feedback resistor;
- a first resistor and a second resistor are respectively connected at one end thereof with said first and second inputs;
- wherein said load is supplied with current flowing either in a normal or reverse direction according to the polarity of a potential difference between the other ends of said first and second resistors.
1 more element
Dependencies are inferred from the claim text.