Driving circuit for charge coupled device
The present invention provides a driving circuit for driving an electronic device, a method of driving an electronic device and a corresponding electronic device including such a driving circuit. The inventive driving circuit is adapted to generate a first and a second clock signal in a push-pull mode. In one embodiment first and second clock signals are generated by respective driver modules and are subject to a push-pull mode coupling provided by a coupling module. Moreover, embodiments of the inventive driving circuit include inductive elements that form a resonant circuit with the internal capacitance of the charge coupled device. The resonant frequency of the resonance circuit substantially equals the frequency of the clock signals, thus effectively allowing for reduction of power consumption of the driving circuit.
1 . An electronic circuit for driving an electronic component comprising:
a clock signal generator;
a driving unit coupled to the clock signal generator and providing at least first and second clock signals based upon a clock signal from said clock signal generator, wherein the second clock signal is inverted compared to the first clock signal,
a coupling module for push-pull coupling of the first and the second clock signals.
2 . The electronic driving circuit according to claim 1 , wherein the electronic component is a charge coupled device.
3 . The electronic driving circuit according to claim 1 , wherein the coupling module comprises a common-mode choke for rejection of common-mode components of the first and second clock signals.
4 . The electronic driving circuit according to claim 1 , further including at least first and a second inductive elements, the first and the second inductive elements and the internal capacitance of the charge coupled device being comprising a resonant circuit having a resonance frequency being substantially equal to the frequency of the master clock signal.
5 . The electronic driving circuit according to claim 4 , further including at least a first and a second resistor having a first and a second resistance, the first and second resistors damping the resonant circuit.
6 . A driving method for a charge coupled device, including the steps of:
generating a master clock signal,
deriving a first and a second clock signal from the master clock signal, the second clock signal being substantially equal to the inverted first clock signal,
coupling the first and second clock signals in push-pull mode by means of a coupling module.
7 . The driving method according to claim 6 , further including a step of driving the charge coupled device by means of a resonant circuit having a resonance frequency corresponding to the frequency of the master clock signal.
8 . An electronic device having a charge coupled device and an electronic driving circuit, the charge coupled device being driven by means of a first and a second clock signal generated by the driving circuit, the driving circuit including:
a clock generator for generating a master clock signal,
a driving unit for generating at least first and second clock signals in response to receiving the master clock signal, the second clock signal being substantially equal to the inverted first clock signal,
a coupling module for push-pull coupling of the first and the second clock signals.