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US 8,577,021 B1Granted
5 ringer equivalent number (REN) ringer circuit using a high voltage level translator and a source follower buffer and method therefor
AssigneeSupertex, Inc.
InventorJimes Lei
Life of this patent
Estimating the term…
Abstract
A 5 Ringer Equivalent Number (REN) ringer circuit has a wave generator. A flip-flop is coupled to the wave generator and has a non-inverting and an inverting output. A high voltage level translator is coupled to each of the non-inverting and the inverting outputs of the flip-flop. A source follower buffer is coupled to an output of each of the high voltage level translators.
Claims20
A 5 Ringer Equivalent Number (REN) ringer circuit comprising:
- a wave generator;
- a flip-flop coupled to the wave generator and having a non-inverting and an inverting output;
- a high voltage level translator having RC shaping coupled to each of the non-inverting and an inverting outputs of the flip-flop and having a collector output terminal;
- and
- a source follower buffer coupled to the collector output terminal of each of the high voltage level translators.
2 more elements
A 5 Ringer Equivalent Number (REN) ringer circuit comprising:
- a square wave generator;
- a flip-flop coupled to the wave generator and having a non-inverting and an inverting output;
- a high voltage level translator with RC shaping coupled to each of the non-inverting and an inverting outputs of the flip-flop and having a collector output terminal;
- and
- a source follower buffer coupled to the collector output terminal of each of the high voltage level translators.
2 more elements
A 5 Ringer Equivalent Number (REN) ringer circuit comprising:
- a square wave generator;
- a flip-flop coupled to the wave generator and having a non-inverting and an inverting output;
- a high voltage level translator with RC shaping coupled to each of the non-inverting and an inverting outputs of the flip-flop;
- and
- a source follower buffer coupled to an output collector terminal of each of the high voltage level translators, wherein the source follower buffer comprises a P-channel MOSFET and an N-channel MOSFET coupled as a source follower.
2 more elements
A 5 Ringer Equivalent Number (REN) ringer circuit comprising:
- a square wave generator;
- a flip-flop coupled to the wave generator and having a non-inverting and an inverting output;
- a high voltage level translator with RC shaping coupled to each of the non-inverting and an inverting outputs of the flip-flop;
- and
- a buffer coupled to an output collector terminal of each of the high voltage level translators, wherein the buffer comprises a PNP bipolar transistor and an NPN bipolar transistor coupled as an emitter follower.
2 more elements
Dependencies are inferred from the claim text.