| 摘要 |
The invention relates to optical communication, particularly to small-sized transmitter/receiver units. An optical transmission module according to the invention is advantageously applied for data transmission according to the IrDA standard. In this embodiment the transmitter (1) is located on top of the receiver (2), which in turn is placed on top of the signal processing circuit (3). The transmitter (1) is preferably in the focus (13') of the optical element (13), or in this embodiment of the lens (13). In this embodiment conductors are formed on the substrate (7), to which conductors the transmitter, the receiver and the signal processing circuit (3) are connected by bonding wires (12). The module pins (11) are also fixed to the substrate so that they are connected to the substrate conductor pattern by bonding wires or by some other prior art method. The pins (11) of the module can also in a prior art manner form a part of the whole substrate or the whole substrate, whereby the signal processing circuit (3), the receiver (2) and the transmitter (1) are fixed directly on the pins (11). <IMAGE> |
