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US 4,002,931 AGranted
Integrated circuit bipolar bootstrap driver
AssigneeIntel Corporation
InventorsFrederick Tsang, H. T. Chua
Life of this patent
Estimating the term…
Abstract
An integrated circuit bipolar bootstrap driver has an interface circuit means, a low logic level circuit means and a bootstrap, high logic level circuit means. The interface circuit means is coupled to the low logic level and high logic level circuit means and selectively activates one of the circuit means in response to an input signal. The high logic level circuit means includes an integrated circuit npn Darlington pair and a pnp low current, low speed lateral type integrated circuit transistor in combination with an integrated circuit capacitor which is used to provide a bootstrapped high logic level signal.
Claims14
In an integrated circuit having a single power supply, a bipolar bootstrap driver said driver comprising:
- A. high logic level circuit means coupled to an output node for providing a fast, boot-strapped high logic level output voltage and fast high current in response to a first input voltage, said high logic level circuit means comprising:
- 1. a bipolar, biased Darlington transistor pair;
- 2. a bipolar transistor of a complementary type to said Darlington transistor pair, said bipolar transistor coupled in parallel to said Darlington transistor pair;
- and
- 3. a resistor and capacitor forming a series RC network in circuit across said Darlington transistor pair;
- B. low logic level circuit means coupled to said output node for providing a fast low logic level output voltage in response to a second input voltage;
- and
- C. an interface circuit means for selectively activating said high and low logic level circuit means in response to said first and second input voltages, said interface circuit means coupled to said high and low logic level circuit means and an input node.
5 more elements
In an integrated circuit, a bipolar bootstrap driver comprising:
- an input interface circuit means including a npn bipolar transistor having its base coupled to a first input node;
- a low level logic circuit means including a first resistor having a first terminal coupled to the emitter of said interface transistor and a second terminal coupled to a ground fixed at a low logic level, and a first npn bipolar, transistor having its base coupled to said first terminal of said first resistor, its emitter coupled to said ground, and its collector coupled to an output node;
- and
- a bootstrap high logic circuit means including a second and third bipolar npn transistor, said second transistor having its base coupled to the collector of said interface transistor, the emitter of said second transistor coupled to the base of said third transistor, the collector of said second transistor coupled to the collector of said third transistor, the base and emitter of said third transistor coupled together by a second resistor, the emitter of said third transistor coupled to said output node, and the collector of said third transistor coupled to a high voltage power supply, including a bootstrapping capacitor having a first terminal coupled to one terminal of a third resistor, the other terminal of said third resistor coupled to the base of said second transistor, and said capacitor having a second terminal coupled to said output node, including a diode having its anode coupled to said voltage supply and its cathode coupled to said first terminal of said capacitor, and including a pnp lateral type bipolar transistor having its emitter coupled to said voltage supply, its base coupled to a second input node, and its collector coupled to said output node.
1 more element
In an integrated circuit having a single power supply, a bipolar bootstrap driver said driver comprising:
- A. high logic level circuit means coupled to an output node for providing a fast, bootstrapped high logic level output voltage and fast high current in response to a first input voltage, said high logic level circuit means comprising:
- 1. a bipolar, biased Darlington transistor pair;
- 2. a bipolar transistor of a complementary type to said Darlington transistor pair, said lateral transistor coupled in parallel to said Darlington transistor pair;
- B. low logic level circuit means coupled to said output node for providing a fast low logic level output voltage in response to a second input voltage;
- C. an interface circuit means for selectively activating said high and low logic level circuit means in response to said first and second input voltages, said interface circuit means coupled to said high and low logic level circuit means and an input node;
- and
- D. all of the above said means formed as part of an integrated circuit.
4 more elements
In an integrated circuit having a single power supply, a bipolar bootstrap driver said driver comprising:
- A. high logic level circuit means coupled to an output node for providing a fast, bootstrapped high logic level output voltage and fast high current in response to a first input voltage, said high logic level circuit means comprising:
- 1. a bipolar, biased Darlington transistor pair;
- and
- 2. a resistor and capacitor forming a series RC network in circuit across said Darlington transistor pair;
- B. low logic level circuit means coupled to said output node for providing a fast low logic level output voltage in response to a second input voltage;
- C. an interface circuit means for selectively activating said high and low logic level circuit means in response to said first and second input voltages, said interface circuit means coupled to said high and low logic level circuit means and an input node;
- and
- D. all of the above said means formed as part of an integrated circuit.
5 more elements
Dependencies are inferred from the claim text.