| 摘要 |
A variable frequency generator utilizing a coulometer for generating a signal having an amplitude that varies in accordance with the integral of a selected function. A DC current source and a variable frequency interrogation oscillator are connected to the input terminals of a coulometer which modulates the output of the oscillator in accordance with the integral of the current from the current source. The output of the coulometer is amplified by an AC amplifier and is then demodulated by a standard envelope detector. The demodulated signal is fed back to the oscillator to proportionally control the frequency of the oscillator, that is, as the amplitude of the modulated signal increases, the frequency of the oscillator increases and, as the amplitude of the demodulated signal decreases, the frequency of the oscillator decreases.
|
