More about oscillator (542)

1-07-1989 | 16 One of the difficulties in the design of high- er-order tuneable band-pass filters is achieving correct tracking of the variable resistor...

1-07-1989 | 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...

1-07-1989 | 027 SWITCH-MODE VOLTAGE REGULATOR Switch-mode power supplies offer the user the benefit of a much greater efficiency than obtainable with a...

1-07-1989 | * 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...

1-07-1989 | *see text R1 045 TIMER WITH AUDIBLE WARNING RESET VI EMI ZIT) id 1 2 P1 * R2 5008 CAI9 220n 9V R3 c2 O Applications of this little circuit i...

1-07-1989 | 046 HCMOS SQUARE WAVE GENERATOR This pulse generator supplies three rectangular output signals with a duty factor of 0.5. The signals have a...

1-07-1989 | TEST & MEASUREMENT 048 VOLTAGE-CONTROLLED OSCILLATOR A1,A2 = 1C2 = TL072 N1...N4 =1C3 = 4071 T 00® T On e5V 894100 • 11 The voltage-contr...

1-07-1989 | 051 GENERAL INTEREST D4 11441 48 I S1 15 09 013 1C3 4060 PI 0 5V 0 Bz O R8 680n BC547B 11•111•11 894071 - 11 DL TOnTOOR 16V 03 Re1 1N414...

1-07-1989 | 052 IMPROVED LOW FUEL INDICATOR The indicator described here obviates the flickering of the "low fuel" warning light on the dashboard caused...

1-07-1989 | 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...