| 摘要 |
The receiver has one or more photodiodes (D1...) whose signal is amplified and passed onto a conditioning part (2). The conditioning part is based on a commercially available remote-control IC (U1) which can condition a remote-control signal. Remote-control ICs, however, are not constructed for being controlled by an electric signal. Their input is rather designed for being connected directly to a photodiode. By connecting an equivalent load (dummy load) (D1') to the input of the remote-control IC it is possible, however, to inject (couple in) any electrical signal. In this way, the detector signal can at first be filtered and amplified, resulting in a substantially increased sensitivity of the receiver. <IMAGE> |
