More about amplifier (487)

1-07-1980 | 1 +9V Li 4004H 5 560n The 12 aerial described in the June edition of Elektor consists of two parts. One of these is a coil which must have a...

1-07-1980 | 68 It has nothing to do with the mail, but it is small enough to go through it. This circuit is a versatile, miniature amplifier and loudspe...

1-06-1980 | 6-22 — elektor june 1980 narrow band IF strip Several things have to be taken care of first. The IF signal, which is produced by the front...

1-02-1980 | aerial amplifiers elektor february 1980 — 2-27 Aerial amplifiers are frequently used to try to improve the sensitivity of an existing rece...

1-09-1979 | The increasing attention being paid to digital methods of audio signal processing has led to a search fo r ways of using output transistor...

1-07-1979 | The basic principle of a current dumping amplifier has been de-scribed previously in Elektor (see Elektors 8 and 21). To recap briefly, the...

1-07-1979 | A high quality servo amplifier can be built using only one IC and a handful of passive components. The SN28654 (Texas Instruments) contains...

1-12-1978 | Although the concept of the pulse-width modulated or `Class-D` audio amplifier has been known since the late nineteen-forties, there has b...

1-07-1978 | Stereo headphones are usually connected to the loudspeaker outputs of the power amp via an attenuator. Although this represents the cheapes...

1-07-1978 | It is possible to reduce distortion in r .f. amplifiers by employing negative feedback. When using this technique, however, it is important...