Cross-coupled, narrow pulse, high voltage level shifting circuit with voltage domain common mode rejection
First Claim
Patent Images
1. A system, comprising:
- a level shifting circuit including;
a high side circuit configured to receive a mixed signal having a common mode signal and a differential mode signal, and to attenuate the common mode signal in the mixed signal to generate an adjusted signal, wherein the high side circuit is further configured to generate a high output signal at a high output node in response to the adjusted signal;
a low side circuit configured to generate a differential signal in response to a high input signal and further configured to generate a low output signal at a low output node of the low side circuit in response to a low input signal; and
a high side high voltage power transistor having a gate connected to the high output node of the high side circuit, the high side high voltage power transistor configured to provide a high portion of an output signal on a first output node in response to the high output signal.
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Abstract
A system for high voltage level shifting includes a level shifting circuit having a high side circuit that receives a mixed signal having a common mode signal and a differential mode signal, and to attenuate the common mode signal in the mixed signal to generate an adjusted signal. The high side circuit generates a high output signal at a high output node in response to the adjusted signal. The system further includes a high side high voltage power transistor having a gate connected to the high output node of the high side circuit. The high side high voltage power transistor configured to provide a high portion of an output signal on a first output node in response to the high output signal.
11 Citations
19 Claims
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1. A system, comprising:
a level shifting circuit including; a high side circuit configured to receive a mixed signal having a common mode signal and a differential mode signal, and to attenuate the common mode signal in the mixed signal to generate an adjusted signal, wherein the high side circuit is further configured to generate a high output signal at a high output node in response to the adjusted signal; a low side circuit configured to generate a differential signal in response to a high input signal and further configured to generate a low output signal at a low output node of the low side circuit in response to a low input signal; and a high side high voltage power transistor having a gate connected to the high output node of the high side circuit, the high side high voltage power transistor configured to provide a high portion of an output signal on a first output node in response to the high output signal. - View Dependent Claims (2, 3, 4, 5)
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6. A circuit, comprising:
a high side circuit, including; current mirrors configured to generate mirrored currents that mirror a set signal and a reset signal that are generated in response to a set pulse and a reset pulse; a cross coupled current mode cancellation circuit connected to the current mirrors, wherein the cross coupled current mode cancellation circuit is configured to attenuate at least a portion of a slew current from a first one of the mirrored currents to generate an adjusted first signal, and to generate a first voltage at a resistor according to the adjusted first signal; and a high side driver configured to provide a high output signal according to activation to the first voltage. - View Dependent Claims (7, 8, 9, 10)
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11. A gate driver circuit, comprising:
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a first current mirror including; a first reference current transistor having a source connected to a positive reference voltage port; a first mirror transistor having a source connected to the positive reference voltage port and a gate connected to a gate and a drain of the first reference current transistor; and a second mirror transistor having a source connected to the positive reference voltage port and a gate connected to the gate and the drain of the first reference current transistor; a signaling set transistor connected in series between the drain of the first reference current transistor and a ground; and a cross coupled current mode cancellation circuit including; a first differential signal detection mirror transistor; a first resistor connected in series with the drain of the second mirror transistor and a negative reference voltage port; and a first common mode cancellation mirror transistor connected in parallel to the first resistor and in series between the drain of the second mirror transistor and the negative reference voltage port, and having a gate connected to a gate and a drain of a second differential signal detection mirror transistor. - View Dependent Claims (12, 13, 14, 15)
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16. A method, comprising:
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generating a set pulse in response to a received high input signal; generating a set signal in response to the set pulse; generating a first mirrored current that mirrors a current of the set signal; generating a second mirrored current that mirrors a current at a first node that carries a reset signal when generated; subtracting the second mirrored current from the first mirrored current to generate an adjusted first signal, the subtracting comprising attenuating a slew current in the first mirrored current to generate the adjusted first signal according to the second mirrored current; generating a first voltage according to the adjusted first signal; and activating a high side driver according to the first voltage and using a cross coupled detector circuit, the activating the high side driver causing the high side driver to provide a high output signal. - View Dependent Claims (17, 18, 19)
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Specification