Ton Giesberts (358)

1-07-1993 | It often happens that someone wants to watch television without the sound disturbing other people in the room. To avoid having a long cab...

1-07-1993 | This audio-frequency receiver is the counterpart of the infra-red transmitter. The output from the infra-red diode D1 is amplified by IC1...

1-07-1993 | Pulse duration modulators require a perfect triangular signal, that is, one that is absolutely symmetrical with straight sides. Any devia...

1-07-1993 | Nowadays, the design of preamplifiers is almost invariably based on integrated circuits. However. there are still many constructors who l...

1-07-1993 | High-order filters are normally designed by using two or more 2nd order sections in series. This means that a 4th-order filter needs at l...

1-07-1993 | The rectifier is intended to improve the bandwidth of most digital multimeters. It is based on a halfwave rectifier in a traditional set-...

1-07-1993 | Active loudspeakers offer the only way of obtalning good bass reproduction from inexpensive or small enclosures. The design described doe...

1-06-1993 | Making an audio signal visible on a display is something that appeals to many audio & hi-fi enthusiasts. Most commercial audio equipment...

1-05-1993 | Computer-controlled hi-fi equipment is no langer a novelty. Such apparatus has given rise to special analogue lCs becoming available that...

1-04-1993 | Most audio output measurements are concerned with the voltage delivered across the loudspeaker by the output stage. If the loudspeaker...