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US 2012/0235747 A1Published application
Broadband, High-Linearity Led Amplifier Having High Output Capacity in a Compact Design
AssigneeSiemens Aktiengesellschaft
InventorsRobert Baumgartner, Andreas Kornbichler, Joachim Walewski
Life of this patent
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Abstract
An amplifier circuit for actuating a light diode is provided. The amplifier circuit may have a small output impedance of approximately 3 Ohms, a large bandwidth having a lower threshold frequency of 200 kHz and an upper threshold frequency of 5 MHz, for example, and an amplitude of the output current of several 100 mA, for example. The amplifier circuit may have an entry stage for actuating a driver circuit that actuates the light diode by means of a direct current supply.
Claims14
An amplifier circuit for actuating a light diode, the amplifier circuit, comprising:
- an entry stage for actuating a driver circuit, which actuates the light diode via a DC current supply,
- wherein the driver circuit comprises a first transistor and a second transistor that are complementary to one another, wherein emitters of the first and second transistors are electrically connected to one another,
- a first current source electrically connected between a first base and a first collector of the first transistor,
- a second current source electrically connected between a second base and a second collector of the second transistor, and
- a voltage control circuit electrically connected between the first and second bases of the first and second transistors.
2 more elements
Dependencies are inferred from the claim text.