US 10,892,755 B2
Driver circuitry for fast, efficient state transitions
Thomas E. Lawson, Malvern, PA (US)
Assigned to CogniPower, LLC, Malvern, PA (US)
Filed by CogniPower, LLC, Malvern, PA (US)
Filed on Jun. 29, 2020, as Appl. No. 16/915,464.
Application 16/915,464 is a continuation in part of application No. 16/740,908, filed on Jan. 13, 2020, granted, now 10,812,077.
Application 16/740,908 is a continuation of application No. 16/281,384, filed on Feb. 21, 2019, granted, now 10,554,206, issued on Feb. 4, 2020.
Claims priority of provisional application 62/869,143, filed on Jul. 1, 2019.
Claims priority of provisional application 62/754,628, filed on Nov. 2, 2018.
Claims priority of provisional application 62/635,584, filed on Feb. 27, 2018.
Prior Publication US 2020/0328747 A1, Oct. 15, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. H03K 19/003 (2006.01); H03K 17/30 (2006.01)
CPC H03K 19/00307 (2013.01) [H03K 17/30 (2013.01); H03K 19/00353 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An article of manufacture comprising:
driven circuitry configured to transition between first and second states; and
driver circuitry configured to generate drive signals to drive the driven circuitry to transition between the first and second states, the driver circuitry comprising:
a first-to-second driver circuit configured to generate a first drive signal to drive the driven circuitry to transition from the first state to the second state; and
a second-to-first driver circuit configured to generate a second drive signal to drive the driven circuitry to transition from the second state to the first state, wherein each driver circuit comprises:
an n-type transistor having a base, a collector, and an emitter and characterized by a turn-on threshold voltage;
a p-type transistor having a base, a collector, and an emitter and characterized by a turn-on threshold voltage, wherein the collector and emitter of the n-type transistor are connected in series with the collector and emitter of the p-type transistor such that, when the two transistors are turned on, current flows from the collector of the n-type transistor to the collector of the p-type transistor; and
a positive-feedback capacitor connected between the collector of a first of the two transistors and the base of a second of the two transistors, wherein:
the trigger circuit is configured such that (i) the two transistors turn on together when the voltage at the base of the n-type transistor exceeds the voltage at the base of the p-type transistor by at least the sum of the turn-on threshold voltages of the two transistors and (ii) the two transistors turn off together when the voltage at the base of the n-type transistor fails to exceed the voltage at the base of the p-type transistor by at least the sum of the turn-on threshold voltages of the two transistors; and
the positive-feedback capacitor ensures that the two transistors turn fully on and off together.