Capacitor pull-up reigister bit

Claim 2

A transfer stage in a capacitor pullup, push-pull register bit coupled to a clock pulse source of driving energy comprising: a load capacitor having one plate thereof connected to the pulse source; a driver electronic switch having a drain terminal connected to the second plate of said load capacitor, a gate terminal for reCeiving control pulses to the transfer stage, and a source terminal tied to a reference voltage; a coupling electronic switch having a source terminal, a gate terminal connected to the clock pulse source, and a drain terminal connected to an output port; and switching means coupled between the drain terminal of the driver switch and the source terminal of the coupling switch, and connected to the clock pulse source and to the control pulse to the transfer stage for transferring pulse information from said driver switch to said coupling switch.

Claim 3

A transfer stage in a capacitor pullup, push-pull register bit as set forth in claim 1 wherein said switching means includes: first and second electronic switches coupled in series to the source terminal of said coupling switch and energized to a conducting mode by control pulses to the transfer stage and the output of the driver switch, respectively.

Claim 4

A transfer stage in a capacitor pullup, push-pull register bit as set forth in claim 2 wherein said electronic switches of the switching means comprise field-effect transistors connected in series from the clock pulse source to ground and individually controlled by control pulses to the transfer stage and the voltage at the drain terminal of the driver switch.

Claim 5

A transfer stage in a capacitor pullup, push-pull register bit as set forth in claim 2 wherein the driver, the coupling, and the electronic switches of the switching means comprise metal-insulator-semiconductor field-effect transistors.

Claim 6

A transfer stage in a capacitor pullup, push-pull register bit coupled to a clock pulse source of driving energy comprising: a driver electronic switch having a drain terminal, a gate terminal for receiving control pulses to the transfer stage, and a source terminal tied to a reference voltage; a first intermediate electronic switch having a drain terminal, a gate terminal interconnected to the gate terminal of said driver switch, and a source terminal tied to a reference voltage; a second intermediate electronic switch having a drain terminal, a gate terminal connected to the drain terminal of said driver switch, and a source terminal tied to the drain terminal of said first intermediate switch; a coupling electronic switch having a gate terminal, a source terminal coupled to the interconnection between said first and second intermediate switches, and a drain terminal connected to an output port; and a load capacitor having one plate connected to the drain terminal of said driver switch and a second plate interconnected with the drain terminal of the second intermediate switch and the gate terminal of the coupling switch to the clock pulse source.

Claim 7

A transfer stage in a capacitor pullup, push-pull register bit coupled to a clock pulse source of driving energy comprising: a driver electronic switch having a drain terminal, a gate terminal for receiving control pulses to the transfer stage, and a source terminal tied to a reference voltage; a first intermediate electronic switch having a drain terminal, a gate terminal interconnected to the gate terminal of said driver switch, and a source terminal tied to a reference voltage; a second intermediate electronic switch having a drain terminal, a gate terminal connected to the drain terminal of said driver switch, and a source terminal tied to the drain terminal of said first intermediate switch; a coupling electronic switch having a gate terminal, a source terminal coupled to the interconnection between said first and second intermediate switches, and a drain terminal connected to an output port; and a load capacitor having one plate connected to the drain terminal of said driver switch and a second plate interconnected with the drain terminal of the second intermediate switch and the gate terminal of the coupling switch to the clock pulse source.

Claim 8

A capacitor pullup, push-pull register bit of a shift register comprising: a first transfer stage coupled to a first clock pulse source and including a driver electronic switch having a first terminal, a control terminal for receiving control pulses to the first transfer stage, and a third terminal at a ground potential, a coupling electronic switch having first and second terminals, and a control terminal coupled to the first clock pulse source, and active circuit means for connecting the clock pulses to the second terminal of said coupling switch, said active circuit means actuated by the control pulses to the first stage and the voltage level at the first terminal of said driver switch; and a second transfer stage coupled to a second clock pulse source and including a first electronic switch having first and second terminals, and a control terminal for receiving control pulses from said first transfer stage, a coupling electronic switch having first and second terminals and a control terminal connected to the second clock pulse source, and active circuit means for connecting said second clock pulse source to the second terminal of said coupling switch, said active circuit means activated by control pulses from said first transfer stage and the voltage signal on the first terminal of said driver switch.

Claim 9

A capacitor pullup, push-pull register bit of a shift register comprising: a first transfer stage coupled to a first clock pulse source and including a driver electronic switch having a first terminal, a control terminal for receiving control pulses to the first transfer stage, and a third terminal at a ground potential, a coupling electronic switch having first and second terminals, and a control terminal coupled to the first clock pulse source, and active circuit means for connecting the clock pulses to the second terminal of said coupling switch, said active circuit means actuated by the control pulses to the first stage and the voltage level at the first terminal of said driver switch; and a second transfer stage coupled to a second clock pulse source and including a first electronic switch having first and second terminals, and a control terminal for receiving control pulses from said first transfer stage, a coupling electronic switch having first and second terminals and a control terminal connected to the second clock pulse source, and active circuit means for connecting said second clock pulse source to the second terminal of said coupling switch, said active circuit means activated by control pulses from said first transfer stage and the voltage signal on the first terminal of said driver switch.

Claim 10

A capacitor pullup, push-pull register bit as set forth in claim 6 wherein the active means of said first and second transfer stages includes a pair of electronic switches in series with the interconnection tied to the second terminal of the respective coupling electronic switch.

Claim 11

A capacitor pullup, push-pull register as set forth in claim 7 wherein the electronic switches of said first and second stage are metal-insulator-semiconductor field-effect transistors.

Claim 12

A transfer stage in a capacitor pullup register bit coupled to a clock pulse source of driving energy comprising: a capacitor having a first plate connected to a clock pulse source; a first transistor having a first terminal connected to the second plate of said capacitor, a control terminal for receiving control pulses to the transfer stage, and a third terminal tied to a reference voltage; a second transistor having a first terminal connected to an output port, a control terminal coupled to the clock pulse source, and a third terminal connected to a junction of said capacitor and said first transistor; and circuit means including a diode having an anode and a cathode, said anode connected to the junction of said first and second transistors and said cathode connected to ground, said capacitor operative when the voltage at said junction exceeds a threshold level to conduct current from said junction to ground.

Claim 13

A transfer stage in a capacitor pullup register bit coupled to a clock pulse source of driving energy comprising: a capacitor having a first plate connected to a clock pulse source; a first transistor having a first terminal connected to the second plate of said capacitor, a control terminal for receiving control pulses to the transfer stage, and a third terminal tied to a reference voltage; a second transistor having a first terminal connected to an output port, a control terminal coupled to the clock pulse source, and a third terminal connected to a junction of said capacitor and said first transistor; and circuit means including a diode having an anode and a cathode, said anode connected to the junction of said first and second transistors and said cathode connected to ground, said capacitor operative when the voltage at said junction exceeds a threshold level to conduct current from said junction to ground.

Claim 14

A transfer stage in a capacitor pullup register as set forth in claim 9 wherein said diode is an alloy junction diode.