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US 4,381,460 AGranted
Bootstrap driver circuit
AssigneeNational Semiconductor Corporation
InventorAbraham Menachem
Life of this patent
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Abstract
A MOS two-phase boostrap driver circuit, having a bootstrap transistor with a gate selectively charged or discharged in response to the level of an input signal, provides for selectively charging the gate of the bootstrap transistor directly from a voltage supply.
Claims5
A two-phase field effect transistor circuit for selectively providing an output signal on an output line in response to an input signal comprising:
- means for providing a reference voltage;
- means for providing a supply voltage;
- means for providing alternating first and second clock signals;
- a first transistor having a gate coupled to receive the input signal, a first terminal coupled to receive the supply voltage and a second terminal;
- a second transistor having a gate coupled to receive the second clock signal, a first terminal coupled to the gate of the first transistor, and a second terminal coupled to the second terminal of the first transistor;
- a third transistor having a gate coupled to receive the second clock signal, a first terminal coupled to the second terminal of the first transistor, and a second terminal;
- a fourth transistor having a gate coupled to receive the second clock signal, a first terminal coupled to the output line, and a second terminal coupled to receive the reference voltage;
- a fifth transistor having a gate coupled to the second terminal of the third transistor, a first terminal coupled to the output line and a second terminal coupled to receive the first clock signal;
- and
- means for providing a capacitance between the gate of the fifth transistor and the output line.
7 more elements
Dependencies are inferred from the claim text.