| 055 HIGH-VOLUME ALARM When this alarm is actuated by a low-level signal at input W, the (FiF) loudspeaker produces a number of 4-tone sequen...
More about oscillator (484)
| Cl D1 10n 15n 22n (loon R2 LSLK en 01...03 = 1N4148 BC547 T2 N1...N4 = ICI = 4093 R8 "Cl C8 0W5 R3 R4 00 135 057 SINGLE-CHIP MELODY GENERATO...
| *see text 5x iN4148 062 RADIO & TV Amateur VHF relay stations are normally actuated by a 1750 Hz call tone. This may give problems when the...
| C Z 70n R2 U D1 02 LT V I 180n •• 470 p H 065 TEST & MEASUREMENT =Ma 560p 6n8 =On C4 5 270n 1I0In LC SINE WAVE GENERATOR R33c1 100nH...1...
| The radio beacon band extends from 280 kHz to 516 kHz. Each beacon has its own characteristic AM modulated morse-coded call sign that is tra...
| 017 48 MHZ CMOS OSCILLATOR Crystal oscillators using digital gates generally do not generate frequencies above 30 MHz, because the necessary...
| 16 One of the difficulties in the design of high- er-order tuneable band-pass filters is achieving correct tracking of the variable resistor...
| 18 026 GENERAL INTEREST The programmable switch may be used, for instance, to simulate a data stream or, as 1 KBM 6 er may be used as the ba...
| 027 SWITCH-MODE VOLTAGE REGULATOR Switch-mode power supplies offer the user the benefit of a much greater efficiency than obtainable with a...
| * See text 028 RADIO & TV The transmitter was designed primarily for use by radio ama- teurs as a radio beacon and as such it provides a goo...