Low-power inverter for crystal oscillator buffer or the like

Details Low-power inverter for crystal oscillator buffer or the like Low-power inverter for crystal oscillator buffer or the like

1993-08-25

1995-10-10

Pascal, Robert J.

Oscillators

Solid state active element oscillator

Transistors

331116R, 331185, 331158, 327374, 327375, 327427, 327379, 326 26, 326 27, 326 28, 326 87, 330264, H03K 1716

Patent

active

054574331

ABSTRACT:
A low-power inverter (53) reduces power consumption over known inverter designs and is especially well-adapted for serving as a buffer in a Pierce crystal oscillator with a large load capacitance. The inverter (53) includes P- and N-side source-follower stages (310, 320) driving CMOS output transistor pairs (350, 360). The source followers are current-limited through current sources (311, 313, 321, 323) which are biased by a stable reference voltage such as a bandgap reference voltage. Clamping devices (331, 332) are provided to limit the voltages on the gates of the output transistors (350, 360), thereby limiting maximum currents thereof. In addition, a helper device (332) is connected to the gate of a P-channel output transistor (350). The P-channel output transistor (350) typically has a large gate area and thus a large capacitance, and the helper device (332) quickly increases the voltage at the gate when an input signal changes to a high voltage.

REFERENCES:
patent: 3947727 (1976-03-01), Stewart
patent: 4806798 (1989-02-01), Kanauchi
patent: 4894561 (1990-01-01), Nogami
patent: 5065049 (1991-11-01), Jang
patent: 5113156 (1992-05-01), Mahabadi et al.
patent: 5179299 (1993-01-01), Tipon
patent: 5192879 (1993-03-01), Aoki et al.
patent: 5206544 (1993-04-01), Chen et al.
patent: 5216293 (1993-06-01), Sei et al.
patent: 5218247 (1993-06-01), Ito et al.
patent: 5229659 (1993-07-01), Sandhu
patent: 5241221 (1993-08-01), Fletcher et al.

Affiliated with

Also associated with

Rating

Low-power inverter for crystal oscillator buffer or the like does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Low-power inverter for crystal oscillator buffer or the like, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low-power inverter for crystal oscillator buffer or the like will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2313063