DRIVING DEVICE AND METHOD
First Claim
1. A driving device, comprising:
- a light emitter generating an optical signal;
a biasing circuit generating a driving signal to activate the light emitter such that the light emitter operates in a working range;
a light receiver detecting the output power of the optical signal for generating a corresponding electrical signal,an automatic control system adjusting the driving signal according to the corresponding electrical signal such that the output power of the optical signal approaches a preset value; and
an alternating current (AC) path coupled between the light emitter and an external signal source for receiving at least one AC modulated signal such that the light emitter generates at least one modulated optical signal.
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Accused Products
Abstract
A driving device including a light emitter, a biasing circuit, a light receiver, an automatic control system, and an alternating current (AC) path is disclosed. The light emitter generates an optical signal. The biasing circuit generates a driving signal to activate the light emitter such that the light emitter operates in a working range. The light receiver detects the output power of the optical signal for generating a corresponding electrical signal. The automatic control system adjusts the driving signal according to the corresponding electrical signal such that the output power of the optical signal approaches a preset value. The AC path is coupled between the light emitter and an external signal source for receiving at least one AC modulated signal such that the light emitter generates at least one modulated optical signal.
11 Citations
20 Claims
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1. A driving device, comprising:
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a light emitter generating an optical signal; a biasing circuit generating a driving signal to activate the light emitter such that the light emitter operates in a working range; a light receiver detecting the output power of the optical signal for generating a corresponding electrical signal, an automatic control system adjusting the driving signal according to the corresponding electrical signal such that the output power of the optical signal approaches a preset value; and an alternating current (AC) path coupled between the light emitter and an external signal source for receiving at least one AC modulated signal such that the light emitter generates at least one modulated optical signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A driving method, comprising:
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generating a driving signal to activate a light emitter such that the light emitter operates in a working range and generates an optical signal; detecting the output power of the optical signal to generate a corresponding electrical signal; adjusting the driving signal according to the corresponding electrical signal such that the output power of the optical signal approaches a preset value; and utilizing an alternating current (AC) path to receive at least one AC modulated signal such that at least one modulated optical signal is generated by the light emitter, wherein the AC path is coupled between the light emitter and an external signal source. - View Dependent Claims (11, 12)
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13. A driving device for driving a laser diode, comprising:
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a light emitter generating an optical signal; a biasing circuit coupled to the light emitter for generating a driving signal such that the light emitter is activated by the driving signal and operates in a working range; a light receiver detecting the output power of the optical signal for generating a corresponding electrical signal; and an automatic control system coupled between the light receiver and the biasing circuit, wherein the automatic control system adjusts a current passing through the light emitter according to the corresponding electrical signal and comprises; a voltage divider modulating a biasing voltage of the light emitter according to a first control signal; and an integral loop coupled to an output terminal of the voltage divider. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification