Patent ID: 8938176
Filing Date: 2015-01-20
Classification: B41J,G03G

Abstract:
1. A printing consumables chip, comprising: a base plate which is provided with a first electrical contact, a second electrical contact, and an electronic module which connects with the first electrical contact and the second electrical contact; wherein the electronic module comprises: a microcontroller; a power circuit which supplies electricity to the microcontroller; a modulation circuit which modulates output signals and comprises a switch device; wherein a control terminal of the switch device is connected with a first pin of the microcontroller and two output terminals of the switch device are connected with the first electrical contact and the ground, respectively; a clock circuit which provides a clock signal to the microcontroller and comprises a comparison unit; wherein a first input terminal of the comparison unit is connected with an external clock signal, a second input terminal of the comparison unit is connected with a reference voltage source, and an output terminal of the comparison unit is connected with the microcontroller; wherein the first pin receives the control signal from the output terminal of the comparison unit, and the control terminal of the switch device is connected with a second pin of the microcontroller; wherein the second electrical contact receives a reference clock signal; and wherein the signal output from the first pin is inverted with the reference clock signal; wherein the clock circuit further comprises a capacitor which is connected in series between the first electrical contact and the first input terminal of the comparison unit; wherein the comparison unit is a voltage comparator; the first input terminal is an inverting input terminal of the voltage comparator; the second input terminal is a non-inverting input terminal of the voltage comparator; and the output terminal of the voltage comparator is connected with an input terminal of an inverter.