CPC G01R 31/52 (2020.01) [H03B 5/1203 (2013.01); H03K 3/0231 (2013.01); H03K 4/502 (2013.01)] | 20 Claims |
1. A system, comprising:
an oscillator circuit on a chip, wherein the oscillator circuit includes:
a charging current generator including a current mirror and an amplifier, wherein the amplifier is coupled to a pin on the chip, and wherein the pin is adapted to be coupled to circuitry internal to the chip and to circuitry external to the chip;
oscillator circuitry coupled to the charging current generator, wherein the oscillator circuitry includes a comparator, a phase generator, a first capacitor coupled to a first switch, and a second capacitor coupled to a second switch; and
leakage circuitry coupled to the current mirror, wherein the leakage circuitry is configured to draw a current from the current mirror proportional to a leakage current flowing through the circuitry external to the chip from the circuitry internal to the chip.
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