Steaphany
New Member
I'm well aware of most non-frequency critical oscillators being based on the timing determined by a Resistance coupled with an Capacitance, but I'm looking for suggestions for a low power, wide operating voltage oscillator based on a Resistance-Inductance timing with a target frequency of 8 KHz.
One concept that I have been considering is the CD4047 CMOS Monostable/Astable Multivibrator which is designed to have the astable frequency set by a single resistor and capacitor. Reference design examples of CMOS RL osciillators that I've found indicate that the CD4047 oscillator circuitry should be compatible with the timing set by an inductor and resistor, but these reference designs were not specifically based on the CD4047.
The reason for exploring this direction is many capacitors are thermally sensitive and as the ambient temperature changes, an RC oscillator is prone to frequency drift, which would not be as pronounced in an RL oscillator.
For this application, I do not want to derive the 8 KHz from a higher frequency that has been divided down, the circuit must produce the 8 KHz directly.
Does anyone have any suggestions or experience in this direction ?
One concept that I have been considering is the CD4047 CMOS Monostable/Astable Multivibrator which is designed to have the astable frequency set by a single resistor and capacitor. Reference design examples of CMOS RL osciillators that I've found indicate that the CD4047 oscillator circuitry should be compatible with the timing set by an inductor and resistor, but these reference designs were not specifically based on the CD4047.
The reason for exploring this direction is many capacitors are thermally sensitive and as the ambient temperature changes, an RC oscillator is prone to frequency drift, which would not be as pronounced in an RL oscillator.
For this application, I do not want to derive the 8 KHz from a higher frequency that has been divided down, the circuit must produce the 8 KHz directly.
Does anyone have any suggestions or experience in this direction ?