Abstract:
Circuit arrangement (CR; CR') for receiving multilevel optical signals (SI) from at least one optical guide (GU), said multilevel signals resulting from superposing a high speed data signal and a low speed data signal, said circuit arrangement (CR; CR') comprising: • - at least one light-receiving component (PD) for converting the optical signals (SI) into electrical current signals (Ipp), • - at least one transimpedance amplifier (TA), being provided with the electrical current signals (I pp) from the light-receiving component (PD), • - at least one automatic gain controller (AG) for controlling the gain or transimpedance (R) of the transimpedance amplifier (TA), in particular in order to keep the amplitude of the output (V out- data-analog) of the transimpedance amplifier (TA) to a desired, for example constant, level for different levels of the electrical current signals (I PD), • - at least one integrator (IN) in a feedback path (FP), said integrator (IN) generating a control signal (Vint), • - at least one voltage-controlled current source (CS), being provided with the control signal (V int) from the integrator (IN), • - at least one limiter (LI) acting as a comparator and generating in its output a logic level for positive or negative voltages in its input, • - at least one second transimpedance amplifier (TA2) arranged in parallel to the transimpedance amplifier (TA), and • - at least one automatic offset controller (AO) for setting the voltage (Voffset) for the second transimpedance amplifier (TA2).
Abstract:
The invention relates to a device (100; 100'; 100''; 100''') for incoupling optical signals into at least one waveguide (10), said device (100; 100'; 100''; 100''') having at least one transmission-side circuit (26) which controls at least one electro-optical converter (28) on the basis of signals coming from transmission-side terminal contacts (22), wherein the converter transmits the optical signals in the direction of the axis (12) of the waveguide (10). The aim of the invention is to develop such a device so as to allow a corresponding miniaturization of the incoupling device with little optical loss while simultaneously keeping a low production complexity. This is achieved in that the transmission-side circuit (26) is arranged substantially on the plane of a transmission-side substrate (20) which has the transmission-side terminal contacts (22). The invention also relates to a corresponding device (140; 140'; 140''; 140''') for outcoupling optical signals from at least one waveguide (10).
Abstract:
The invention relates to the further development of a device (100) for coupling optical signals in at least one waveguide (10), said device (100) having at least one transmission-side circuit (26), which, on the basis of signals incoming from transmission-side connection contacts (22), actuates at least one electro-optical converter (28), which transmits the optical signals in the direction of the axis (12) of the waveguide (10), such that the expense for production is low, wherein, according to the invention, the electro-optical converter (28) is received, in particular embedded, in at least one transmission-side receptacle/alignment module (40), the transmission-side receptacle/alignment module (40) has at least one groove or channel-shaped recess (46) for aligning the waveguide (10) in relation to the electro-optical converter (28) and the transmission-side receptacle/alignment module (40) is received, in particular fitted, into a recess (38) in a transmission-side substrate (20) in a substantially form and/or force-fit manner. The invention further relates to a device (140) for decoupling optical signals from at least one waveguide (10).
Abstract:
The invention relates to a circuit arrangement (S, E) and to a corresponding method, using single-ended signals based on logic levels and differential, in particular common mode based signals, in which a serialized signal is continually transmitted in an accurate and stable manner.
Abstract:
The invention relates to a circuit arrangement (100; 100') and to a method for the inexpensive transmission of signals from at least one data source to at least one data sink, said signals being TMDS encoded at least in part, especially at least in a time slot manner and being associated with especially at least one DVI data connection and/or at least one HDMI data connection. According to the invention, the driver circuit (S1; S1') of at least one connection interface (IQ) which is mounted upstream and which is associated with the data source is supplied with a supply voltage (VDVI/HDMI) which is especially charged with up to approximately 55 milliampere, for example in the order of approximately five volt. The electrical TMDS encoded signals are electro-optically converted by means of at least one light-emitting element (LD1) mounted downstream of the driver circuit (S1; S1'), especially by means of at least one light diode, by means of at least one light-emitting diode, by means of at least one laser diode or by means of at least one laser, for example by means of at least one semiconductor laser, and are coupled into at least one optical fiber (F1), especially into at least one glass fiber or into at least one plastic fiber, for example into at least one plastic fiber, as light (LTMDS) that is supplied with TMDS encoded signals. The direct current portion supplied from a TMDS transmitter (TM) to the connection interface (IQ) associated with the data source is converted to a modulated signal current for controlling the light-emitting element (LD1) by means of the driver circuit (S1; S1'). The light (LTMDS) supplied with the TMDS encoded signals is coupled out from the optical fiber (F1) by means of at least one light-absorbing element (PD1), especially by means of a photodiode, is opto-electrically converted and supplied to at least one transimpedance converter circuit (S2; S2') which is mounted downstream of the light-absorbing element (PD1) and upstream of a connection interface (IS) that is associated with the data sink, the transimpedance converter circuit (S2; S2') being supplied by a direct voltage portion that is applied to at least one differential core pair (AD, AD').