Transducer control system
First Claim
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1. A transducer control circuit for connection between a transducer and a transducer power source, said transducer having input leads, and an active acoustic radiation member subject to varying loading and a reaction member, comprising:
- (a) means connected to said transducer input leads for obtaining signals indicative of the input current and voltage of said transducer; and
(b) circuit means responsive to said current and voltage indicative signals for generating a control signal proportional to the velocity of said radiation member.
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Abstract
A control system for a Tonpilz transducer which is positioned between the transducer and the transducer drive amplifier. The control system determines the head velocity of the transducer from the input current and voltage and utilizes this determination in a feedback arrangement to maintain proper transducer excitation.
52 Citations
10 Claims
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1. A transducer control circuit for connection between a transducer and a transducer power source, said transducer having input leads, and an active acoustic radiation member subject to varying loading and a reaction member, comprising:
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(a) means connected to said transducer input leads for obtaining signals indicative of the input current and voltage of said transducer; and (b) circuit means responsive to said current and voltage indicative signals for generating a control signal proportional to the velocity of said radiation member.
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2. A transducer control circuit for connection between a transducer and a transducer power source, said transducer having input leads, an active acoustic radiation member subject to varying loading a reaction member and an electrical equivalent circuit analogy which includes an electrical circuit component representative of said radiation member, comprising:
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(a) means connected to said transducer input leads for obtaining signals indicative of the input current and voltage of said transducer; and (b) circuit means responsive to said current and voltage indicative signals for generating a control signal proportional to the motional current through said electrical circuit component of said electrical equivalent circuit analogy, said motional current being proportional to the velocity of said radiation member. - View Dependent Claims (3, 4, 5, 6, 7, 8)
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9. A transducer control circuit for connection between a transducer and a transducer power source, said transducer having input leads, an active acoustic radiation member subject to varying loading a reaction member and an electrical equivalent circuit analogy which includes an electrical circuit component representative of said radiation member, comprising:
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(a) first means for obtaining a signal proportional to the input current of said transducer; (b) second means for obtaining positive and negative signals proportional to the input voltage of said transducer; and (c) active circuit means responsive to all said signals for generating a control signal proportional to the motional current through said electrical circuit component of said electrical equivalent circuit analogy, said motional current being proportional to the velocity of said radiation member. - View Dependent Claims (10)
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Specification